/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:22:24,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:22:24,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:22:24,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:22:24,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:22:24,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:22:24,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:22:24,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:22:24,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:22:24,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:22:24,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:22:24,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:22:24,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:22:24,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:22:24,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:22:24,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:22:24,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:22:24,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:22:24,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:22:24,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:22:24,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:22:24,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:22:24,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:22:24,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:22:24,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:22:24,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:22:24,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:22:24,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:22:24,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:22:24,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 18:22:24,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:22:24,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:22:24,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:22:24,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:22:24,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:22:24,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:22:24,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:22:24,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:22:24,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:22:24,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:22:24,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:22:24,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:22:24,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:22:24,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:22:24,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:22:24,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:22:24,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:22:24,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:22:24,626 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:22:24,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:22:24,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:22:24,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:22:24,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:22:24,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:22:24,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:22:24,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:22:24,629 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:22:24,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:22:24,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:22:24,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:22:24,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:22:24,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:22:24,883 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:22:24,885 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:22:24,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-07-09 18:22:24,886 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-07-09 18:22:24,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:22:24,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:22:24,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:22:24,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:22:24,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:22:24,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:22:24,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:22:24,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:22:24,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:22:24,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... [2021-07-09 18:22:24,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:22:24,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:22:24,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:22:24,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:22:24,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:22:25,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:22:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:22:25,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:22:25,075 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:22:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:22:25,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:22:25,075 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:22:25,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:22:25,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:22:25,076 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:22:25,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:22:25,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:22:25,077 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:22:25,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:22:25,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:22:25,078 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:22:25,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:22:25,265 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:22:25,266 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:22:25 BoogieIcfgContainer [2021-07-09 18:22:25,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:22:25,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:22:25,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:22:25,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:22:25,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:24" (1/2) ... [2021-07-09 18:22:25,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f4769d and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:22:25, skipping insertion in model container [2021-07-09 18:22:25,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:22:25" (2/2) ... [2021-07-09 18:22:25,271 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-07-09 18:22:25,275 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:22:25,275 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:22:25,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:22:25,275 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:22:25,310 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 18:22:25,326 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 18:22:25,350 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:22:25,350 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:22:25,350 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:22:25,350 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:22:25,350 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:22:25,350 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:22:25,350 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:22:25,350 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:22:25,359 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-07-09 18:22:25,398 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:22:25,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:25,417 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:25,418 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-07-09 18:22:25,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:25,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970637518] [2021-07-09 18:22:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:25,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970637518] [2021-07-09 18:22:25,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970637518] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:25,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:25,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:22:25,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194209361] [2021-07-09 18:22:25,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:22:25,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:22:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:22:25,612 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-07-09 18:22:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:25,664 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-07-09 18:22:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:22:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2021-07-09 18:22:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:25,690 INFO L225 Difference]: With dead ends: 1236 [2021-07-09 18:22:25,691 INFO L226 Difference]: Without dead ends: 1109 [2021-07-09 18:22:25,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:22:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-07-09 18:22:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-07-09 18:22:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-07-09 18:22:25,783 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-07-09 18:22:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:25,784 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-07-09 18:22:25,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-07-09 18:22:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-07-09 18:22:25,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:22:25,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:25,792 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:25,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:22:25,793 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-07-09 18:22:25,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:25,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152385627] [2021-07-09 18:22:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:25,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152385627] [2021-07-09 18:22:25,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152385627] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:25,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:25,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:25,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473293917] [2021-07-09 18:22:25,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:25,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:25,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:25,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:25,856 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:25,892 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-07-09 18:22:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:22:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:25,901 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 18:22:25,901 INFO L226 Difference]: Without dead ends: 1418 [2021-07-09 18:22:25,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-07-09 18:22:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-07-09 18:22:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-07-09 18:22:25,939 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-07-09 18:22:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:25,939 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-07-09 18:22:25,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-07-09 18:22:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:22:25,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:25,944 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:25,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:22:25,944 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-07-09 18:22:25,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:25,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346353598] [2021-07-09 18:22:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:25,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:25,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346353598] [2021-07-09 18:22:25,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346353598] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:25,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:25,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:25,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17251912] [2021-07-09 18:22:25,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:25,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:25,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:25,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:25,994 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:26,039 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-07-09 18:22:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:22:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:26,054 INFO L225 Difference]: With dead ends: 2017 [2021-07-09 18:22:26,055 INFO L226 Difference]: Without dead ends: 1875 [2021-07-09 18:22:26,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-09 18:22:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-07-09 18:22:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-07-09 18:22:26,139 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-07-09 18:22:26,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:26,140 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-07-09 18:22:26,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-07-09 18:22:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:26,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:26,148 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:26,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:22:26,148 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-07-09 18:22:26,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:26,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757080746] [2021-07-09 18:22:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:26,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:26,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757080746] [2021-07-09 18:22:26,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757080746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:26,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655369170] [2021-07-09 18:22:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:22:26,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:26,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655369170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:26,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:26,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-09 18:22:26,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334803697] [2021-07-09 18:22:26,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:22:26,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:26,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:22:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:26,388 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:26,532 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-07-09 18:22:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:22:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:22:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:26,544 INFO L225 Difference]: With dead ends: 2308 [2021-07-09 18:22:26,544 INFO L226 Difference]: Without dead ends: 2108 [2021-07-09 18:22:26,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-09 18:22:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-07-09 18:22:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-07-09 18:22:26,599 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-07-09 18:22:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:26,599 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-07-09 18:22:26,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-07-09 18:22:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:26,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:26,604 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:26,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:26,818 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:26,818 INFO L82 PathProgramCache]: Analyzing trace with hash -239710988, now seen corresponding path program 1 times [2021-07-09 18:22:26,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:26,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930602969] [2021-07-09 18:22:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:26,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:26,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930602969] [2021-07-09 18:22:26,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930602969] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:26,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:26,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:26,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087075059] [2021-07-09 18:22:26,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:26,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:26,840 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:26,933 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-07-09 18:22:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:26,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:22:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:26,943 INFO L225 Difference]: With dead ends: 1950 [2021-07-09 18:22:26,944 INFO L226 Difference]: Without dead ends: 1860 [2021-07-09 18:22:26,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-07-09 18:22:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-07-09 18:22:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-07-09 18:22:26,995 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-07-09 18:22:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:26,995 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-07-09 18:22:26,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-07-09 18:22:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:26,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:26,999 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:26,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:22:27,000 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash -647935628, now seen corresponding path program 2 times [2021-07-09 18:22:27,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569188497] [2021-07-09 18:22:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:27,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:27,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569188497] [2021-07-09 18:22:27,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569188497] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:27,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:27,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:27,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936713510] [2021-07-09 18:22:27,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:27,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:27,032 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,090 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-07-09 18:22:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:22:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,098 INFO L225 Difference]: With dead ends: 1308 [2021-07-09 18:22:27,098 INFO L226 Difference]: Without dead ends: 1308 [2021-07-09 18:22:27,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-09 18:22:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-07-09 18:22:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-07-09 18:22:27,128 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-07-09 18:22:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,129 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-07-09 18:22:27,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-07-09 18:22:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:27,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,131 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:22:27,132 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-07-09 18:22:27,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644296365] [2021-07-09 18:22:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:27,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644296365] [2021-07-09 18:22:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644296365] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:27,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:27,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:27,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148772578] [2021-07-09 18:22:27,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:27,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:27,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:27,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:27,160 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,200 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-07-09 18:22:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:27,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:22:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,207 INFO L225 Difference]: With dead ends: 1142 [2021-07-09 18:22:27,207 INFO L226 Difference]: Without dead ends: 1120 [2021-07-09 18:22:27,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-09 18:22:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-07-09 18:22:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-07-09 18:22:27,233 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-07-09 18:22:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,233 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-07-09 18:22:27,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-07-09 18:22:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:22:27,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,237 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:22:27,237 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash -236313260, now seen corresponding path program 1 times [2021-07-09 18:22:27,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288320697] [2021-07-09 18:22:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:27,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:27,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288320697] [2021-07-09 18:22:27,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288320697] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:27,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:27,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:27,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143239386] [2021-07-09 18:22:27,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:27,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:27,276 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-07-09 18:22:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,295 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2021-07-09 18:22:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-07-09 18:22:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,302 INFO L225 Difference]: With dead ends: 1334 [2021-07-09 18:22:27,302 INFO L226 Difference]: Without dead ends: 1334 [2021-07-09 18:22:27,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-07-09 18:22:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2021-07-09 18:22:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2021-07-09 18:22:27,326 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2021-07-09 18:22:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,327 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2021-07-09 18:22:27,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-07-09 18:22:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2021-07-09 18:22:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:22:27,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,332 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 18:22:27,332 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2123280916, now seen corresponding path program 1 times [2021-07-09 18:22:27,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952007081] [2021-07-09 18:22:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:27,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:27,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952007081] [2021-07-09 18:22:27,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952007081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:27,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145887923] [2021-07-09 18:22:27,365 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 [2021-07-09 18:22:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:22:27,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:27,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145887923] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:27,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:22:27,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-07-09 18:22:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72476879] [2021-07-09 18:22:27,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:27,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:27,488 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-07-09 18:22:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,513 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2021-07-09 18:22:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-07-09 18:22:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,532 INFO L225 Difference]: With dead ends: 1658 [2021-07-09 18:22:27,532 INFO L226 Difference]: Without dead ends: 1658 [2021-07-09 18:22:27,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-07-09 18:22:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2021-07-09 18:22:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2021-07-09 18:22:27,563 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2021-07-09 18:22:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,563 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2021-07-09 18:22:27,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2021-07-09 18:22:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2021-07-09 18:22:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:27,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,566 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:27,783 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1655387498, now seen corresponding path program 1 times [2021-07-09 18:22:27,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238086233] [2021-07-09 18:22:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:27,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:27,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238086233] [2021-07-09 18:22:27,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238086233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:27,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416301078] [2021-07-09 18:22:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:28,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 18:22:28,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:28,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 18:22:28,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:28,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416301078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:28,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:28,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069105535] [2021-07-09 18:22:28,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:28,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:28,117 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:28,314 INFO L93 Difference]: Finished difference Result 2437 states and 9137 transitions. [2021-07-09 18:22:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:22:28,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:22:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:28,322 INFO L225 Difference]: With dead ends: 2437 [2021-07-09 18:22:28,322 INFO L226 Difference]: Without dead ends: 2358 [2021-07-09 18:22:28,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-07-09 18:22:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1653. [2021-07-09 18:22:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.7421307506053267) internal successors, (6182), 1652 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 6182 transitions. [2021-07-09 18:22:28,367 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 6182 transitions. Word has length 29 [2021-07-09 18:22:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:28,367 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 6182 transitions. [2021-07-09 18:22:28,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 6182 transitions. [2021-07-09 18:22:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:28,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:28,372 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:28,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:22:28,589 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1973616880, now seen corresponding path program 2 times [2021-07-09 18:22:28,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:28,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999682780] [2021-07-09 18:22:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:28,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999682780] [2021-07-09 18:22:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999682780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632665533] [2021-07-09 18:22:28,721 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:28,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:28,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 18:22:28,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:28,843 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 15 treesize of output 11 [2021-07-09 18:22:28,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:28,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632665533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:28,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:28,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687883516] [2021-07-09 18:22:28,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:28,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:28,876 INFO L87 Difference]: Start difference. First operand 1653 states and 6182 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:29,012 INFO L93 Difference]: Finished difference Result 2489 states and 9353 transitions. [2021-07-09 18:22:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:22:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:22:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:29,020 INFO L225 Difference]: With dead ends: 2489 [2021-07-09 18:22:29,020 INFO L226 Difference]: Without dead ends: 2410 [2021-07-09 18:22:29,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-09 18:22:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1791. [2021-07-09 18:22:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.7452513966480447) internal successors, (6704), 1790 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6704 transitions. [2021-07-09 18:22:29,093 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6704 transitions. Word has length 29 [2021-07-09 18:22:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:29,094 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6704 transitions. [2021-07-09 18:22:29,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6704 transitions. [2021-07-09 18:22:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:29,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:29,099 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:29,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:29,313 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2042339794, now seen corresponding path program 3 times [2021-07-09 18:22:29,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:29,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507313484] [2021-07-09 18:22:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:29,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:29,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507313484] [2021-07-09 18:22:29,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507313484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:29,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778019714] [2021-07-09 18:22:29,431 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:29,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:29,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:29,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:29,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:22:29,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:29,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-07-09 18:22:29,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 18:22:29,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:29,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:29,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778019714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:29,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:29,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329489247] [2021-07-09 18:22:29,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:29,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:29,594 INFO L87 Difference]: Start difference. First operand 1791 states and 6704 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:29,755 INFO L93 Difference]: Finished difference Result 3013 states and 11337 transitions. [2021-07-09 18:22:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:22:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:22:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:29,766 INFO L225 Difference]: With dead ends: 3013 [2021-07-09 18:22:29,766 INFO L226 Difference]: Without dead ends: 2934 [2021-07-09 18:22:29,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-09 18:22:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1887. [2021-07-09 18:22:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2021-07-09 18:22:29,833 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2021-07-09 18:22:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:29,833 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2021-07-09 18:22:29,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2021-07-09 18:22:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:29,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:29,838 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:30,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 18:22:30,053 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 582053582, now seen corresponding path program 4 times [2021-07-09 18:22:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:30,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607417567] [2021-07-09 18:22:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:30,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:30,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607417567] [2021-07-09 18:22:30,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607417567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:30,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126858964] [2021-07-09 18:22:30,153 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:30,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:30,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:30,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:30,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:30,230 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 17 treesize of output 13 [2021-07-09 18:22:30,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:30,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:30,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:30,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:30,259 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 15 treesize of output 11 [2021-07-09 18:22:30,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:30,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:30,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:30,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126858964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:30,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:30,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:30,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642113189] [2021-07-09 18:22:30,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:30,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:30,299 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:30,505 INFO L93 Difference]: Finished difference Result 3013 states and 11358 transitions. [2021-07-09 18:22:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:22:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:22:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:30,515 INFO L225 Difference]: With dead ends: 3013 [2021-07-09 18:22:30,515 INFO L226 Difference]: Without dead ends: 2934 [2021-07-09 18:22:30,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:22:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-09 18:22:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2081. [2021-07-09 18:22:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2021-07-09 18:22:30,569 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2021-07-09 18:22:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:30,569 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2021-07-09 18:22:30,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2021-07-09 18:22:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:30,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:30,575 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:30,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:30,793 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash -83909336, now seen corresponding path program 5 times [2021-07-09 18:22:30,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:30,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583183474] [2021-07-09 18:22:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:30,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:30,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583183474] [2021-07-09 18:22:30,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583183474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:30,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571387109] [2021-07-09 18:22:30,910 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:30,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:30,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:30,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:22:30,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:30,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-09 18:22:30,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:30,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:30,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:30,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:31,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 18:22:31,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:31,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:31,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:31,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:31,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571387109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:31,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:31,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:31,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781825207] [2021-07-09 18:22:31,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:31,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:31,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:31,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:31,070 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:31,254 INFO L93 Difference]: Finished difference Result 2791 states and 10482 transitions. [2021-07-09 18:22:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:22:31,254 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:22:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:31,264 INFO L225 Difference]: With dead ends: 2791 [2021-07-09 18:22:31,264 INFO L226 Difference]: Without dead ends: 2712 [2021-07-09 18:22:31,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:22:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-09 18:22:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 1882. [2021-07-09 18:22:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2021-07-09 18:22:31,313 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2021-07-09 18:22:31,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:31,313 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2021-07-09 18:22:31,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2021-07-09 18:22:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:31,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:31,319 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:31,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:22:31,533 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2053161624, now seen corresponding path program 6 times [2021-07-09 18:22:31,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:31,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400035195] [2021-07-09 18:22:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:31,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:31,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400035195] [2021-07-09 18:22:31,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400035195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:31,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832160137] [2021-07-09 18:22:31,657 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:31,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:22:31,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:31,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:22:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:31,750 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 15 treesize of output 11 [2021-07-09 18:22:31,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:31,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:31,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:31,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-07-09 18:22:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 18:22:31,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:31,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:31,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:31,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:31,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832160137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:31,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:31,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 18:22:31,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829482970] [2021-07-09 18:22:31,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:22:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:22:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:31,831 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:32,073 INFO L93 Difference]: Finished difference Result 2687 states and 10043 transitions. [2021-07-09 18:22:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:22:32,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:22:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:32,082 INFO L225 Difference]: With dead ends: 2687 [2021-07-09 18:22:32,082 INFO L226 Difference]: Without dead ends: 2608 [2021-07-09 18:22:32,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:22:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-09 18:22:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1926. [2021-07-09 18:22:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2021-07-09 18:22:32,133 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2021-07-09 18:22:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:32,134 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2021-07-09 18:22:32,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2021-07-09 18:22:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:22:32,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:32,137 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:32,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:22:32,355 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:32,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:32,355 INFO L82 PathProgramCache]: Analyzing trace with hash 586599064, now seen corresponding path program 7 times [2021-07-09 18:22:32,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:32,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770034264] [2021-07-09 18:22:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:32,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:32,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770034264] [2021-07-09 18:22:32,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770034264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529588483] [2021-07-09 18:22:32,383 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:22:32,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:32,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529588483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:32,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-09 18:22:32,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063478748] [2021-07-09 18:22:32,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:22:32,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:22:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:22:32,482 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:32,541 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2021-07-09 18:22:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:22:32,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:22:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:32,551 INFO L225 Difference]: With dead ends: 3472 [2021-07-09 18:22:32,551 INFO L226 Difference]: Without dead ends: 3318 [2021-07-09 18:22:32,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:22:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-07-09 18:22:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2021-07-09 18:22:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2021-07-09 18:22:32,629 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2021-07-09 18:22:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:32,630 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2021-07-09 18:22:32,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2021-07-09 18:22:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:22:32,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:32,635 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:32,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:22:32,852 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 413869912, now seen corresponding path program 8 times [2021-07-09 18:22:32,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:32,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837877557] [2021-07-09 18:22:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:32,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:32,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837877557] [2021-07-09 18:22:32,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837877557] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:32,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:32,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:22:32,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064575960] [2021-07-09 18:22:32,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:22:32,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:32,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:22:32,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:32,876 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:32,911 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2021-07-09 18:22:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:22:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:32,927 INFO L225 Difference]: With dead ends: 5761 [2021-07-09 18:22:32,927 INFO L226 Difference]: Without dead ends: 5510 [2021-07-09 18:22:32,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-07-09 18:22:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2021-07-09 18:22:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2021-07-09 18:22:33,034 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2021-07-09 18:22:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:33,034 INFO L482 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2021-07-09 18:22:33,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2021-07-09 18:22:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:33,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:33,045 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:33,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-09 18:22:33,045 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash -973577864, now seen corresponding path program 9 times [2021-07-09 18:22:33,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:33,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008101736] [2021-07-09 18:22:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:22:33,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:33,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008101736] [2021-07-09 18:22:33,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008101736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:33,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051007593] [2021-07-09 18:22:33,074 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 [2021-07-09 18:22:33,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:33,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:33,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:22:33,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051007593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:33,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:33,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:22:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605945382] [2021-07-09 18:22:33,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:22:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:22:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:22:33,187 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:33,555 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2021-07-09 18:22:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:22:33,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:33,606 INFO L225 Difference]: With dead ends: 17927 [2021-07-09 18:22:33,606 INFO L226 Difference]: Without dead ends: 15301 [2021-07-09 18:22:33,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:22:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2021-07-09 18:22:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2021-07-09 18:22:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2021-07-09 18:22:33,889 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2021-07-09 18:22:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:33,889 INFO L482 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2021-07-09 18:22:33,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:33,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2021-07-09 18:22:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:33,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:33,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:34,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:22:34,195 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash 726243605, now seen corresponding path program 10 times [2021-07-09 18:22:34,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:34,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307809287] [2021-07-09 18:22:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:34,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307809287] [2021-07-09 18:22:34,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307809287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279829491] [2021-07-09 18:22:34,252 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:34,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:34,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:34,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:34,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279829491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:34,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:34,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:22:34,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720609011] [2021-07-09 18:22:34,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:22:34,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:22:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:22:34,345 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:34,721 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2021-07-09 18:22:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:22:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:34,792 INFO L225 Difference]: With dead ends: 21371 [2021-07-09 18:22:34,792 INFO L226 Difference]: Without dead ends: 20932 [2021-07-09 18:22:34,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:22:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2021-07-09 18:22:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2021-07-09 18:22:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2021-07-09 18:22:35,313 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2021-07-09 18:22:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:35,313 INFO L482 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2021-07-09 18:22:35,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2021-07-09 18:22:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:35,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:35,346 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:35,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:35,561 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash 493451422, now seen corresponding path program 11 times [2021-07-09 18:22:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:35,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302112345] [2021-07-09 18:22:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:35,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:35,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302112345] [2021-07-09 18:22:35,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302112345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:35,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071520892] [2021-07-09 18:22:35,591 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:35,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:35,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:35,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071520892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:35,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:35,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:35,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802558369] [2021-07-09 18:22:35,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:35,736 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:36,129 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2021-07-09 18:22:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:22:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:36,190 INFO L225 Difference]: With dead ends: 20596 [2021-07-09 18:22:36,190 INFO L226 Difference]: Without dead ends: 20518 [2021-07-09 18:22:36,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:22:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2021-07-09 18:22:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2021-07-09 18:22:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2021-07-09 18:22:36,649 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2021-07-09 18:22:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:36,650 INFO L482 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2021-07-09 18:22:36,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2021-07-09 18:22:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:36,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:36,684 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:36,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:36,897 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:36,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-07-09 18:22:36,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:36,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512774522] [2021-07-09 18:22:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:36,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:36,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512774522] [2021-07-09 18:22:36,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512774522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:36,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554770550] [2021-07-09 18:22:36,920 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:36,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:22:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:37,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554770550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:37,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:37,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:37,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088963187] [2021-07-09 18:22:37,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:37,027 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:37,440 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2021-07-09 18:22:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:22:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:37,504 INFO L225 Difference]: With dead ends: 22733 [2021-07-09 18:22:37,505 INFO L226 Difference]: Without dead ends: 21028 [2021-07-09 18:22:37,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:22:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-07-09 18:22:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2021-07-09 18:22:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2021-07-09 18:22:37,972 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2021-07-09 18:22:37,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:37,972 INFO L482 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2021-07-09 18:22:37,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:37,972 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2021-07-09 18:22:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:38,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:38,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:38,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:22:38,225 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1422790198, now seen corresponding path program 13 times [2021-07-09 18:22:38,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:38,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844717949] [2021-07-09 18:22:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:38,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:38,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844717949] [2021-07-09 18:22:38,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844717949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:38,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585372406] [2021-07-09 18:22:38,243 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:38,425 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-09 18:22:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:38,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585372406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:38,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:38,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:22:38,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291928423] [2021-07-09 18:22:38,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:22:38,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:22:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:22:38,450 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:38,890 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2021-07-09 18:22:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:22:38,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:39,104 INFO L225 Difference]: With dead ends: 31402 [2021-07-09 18:22:39,104 INFO L226 Difference]: Without dead ends: 31094 [2021-07-09 18:22:39,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:22:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2021-07-09 18:22:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2021-07-09 18:22:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2021-07-09 18:22:39,650 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2021-07-09 18:22:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:39,650 INFO L482 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2021-07-09 18:22:39,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2021-07-09 18:22:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:39,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:39,698 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:39,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:39,909 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:39,910 INFO L82 PathProgramCache]: Analyzing trace with hash 959184970, now seen corresponding path program 14 times [2021-07-09 18:22:39,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:39,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153391048] [2021-07-09 18:22:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:39,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:39,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153391048] [2021-07-09 18:22:39,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153391048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:39,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839812030] [2021-07-09 18:22:39,950 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:39,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:39,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:39,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:40,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839812030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:40,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:40,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:40,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141700800] [2021-07-09 18:22:40,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:40,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:40,052 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:40,602 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2021-07-09 18:22:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:22:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:40,712 INFO L225 Difference]: With dead ends: 33709 [2021-07-09 18:22:40,712 INFO L226 Difference]: Without dead ends: 32656 [2021-07-09 18:22:40,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:22:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2021-07-09 18:22:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2021-07-09 18:22:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2021-07-09 18:22:41,624 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2021-07-09 18:22:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:41,624 INFO L482 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2021-07-09 18:22:41,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2021-07-09 18:22:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:41,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:41,675 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:41,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:22:41,889 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1446275945, now seen corresponding path program 15 times [2021-07-09 18:22:41,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:41,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672339515] [2021-07-09 18:22:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:41,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:41,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672339515] [2021-07-09 18:22:41,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672339515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:41,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389023230] [2021-07-09 18:22:41,906 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:41,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:41,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389023230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:41,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:41,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:41,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816722948] [2021-07-09 18:22:41,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:41,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:41,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:41,998 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:42,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:42,541 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2021-07-09 18:22:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:22:42,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:42,645 INFO L225 Difference]: With dead ends: 31214 [2021-07-09 18:22:42,645 INFO L226 Difference]: Without dead ends: 31106 [2021-07-09 18:22:42,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:22:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2021-07-09 18:22:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2021-07-09 18:22:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2021-07-09 18:22:43,269 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2021-07-09 18:22:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:43,269 INFO L482 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2021-07-09 18:22:43,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2021-07-09 18:22:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:43,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:43,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:43,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:43,519 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:43,519 INFO L82 PathProgramCache]: Analyzing trace with hash 351777995, now seen corresponding path program 16 times [2021-07-09 18:22:43,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:43,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232604292] [2021-07-09 18:22:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:22:43,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:43,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232604292] [2021-07-09 18:22:43,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232604292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:43,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879504065] [2021-07-09 18:22:43,544 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:43,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:22:43,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 18:22:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879504065] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:43,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:22:43,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-07-09 18:22:43,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902704428] [2021-07-09 18:22:43,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:43,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:43,647 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:44,001 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2021-07-09 18:22:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 37 [2021-07-09 18:22:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:44,103 INFO L225 Difference]: With dead ends: 29524 [2021-07-09 18:22:44,104 INFO L226 Difference]: Without dead ends: 29524 [2021-07-09 18:22:44,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2021-07-09 18:22:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2021-07-09 18:22:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2021-07-09 18:22:44,815 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2021-07-09 18:22:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:44,815 INFO L482 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2021-07-09 18:22:44,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2021-07-09 18:22:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:44,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:44,859 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:45,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:22:45,060 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2034805493, now seen corresponding path program 17 times [2021-07-09 18:22:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:45,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482912081] [2021-07-09 18:22:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 18:22:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482912081] [2021-07-09 18:22:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482912081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229740355] [2021-07-09 18:22:45,083 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:45,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:45,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:22:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 18:22:45,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229740355] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:45,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:22:45,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-07-09 18:22:45,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314362458] [2021-07-09 18:22:45,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:22:45,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:45,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:22:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:45,155 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:45,327 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2021-07-09 18:22:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:45,572 INFO L225 Difference]: With dead ends: 30000 [2021-07-09 18:22:45,572 INFO L226 Difference]: Without dead ends: 30000 [2021-07-09 18:22:45,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2021-07-09 18:22:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2021-07-09 18:22:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2021-07-09 18:22:46,189 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2021-07-09 18:22:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:46,189 INFO L482 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2021-07-09 18:22:46,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2021-07-09 18:22:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:46,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:46,241 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:46,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:22:46,442 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:46,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1631458869, now seen corresponding path program 18 times [2021-07-09 18:22:46,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:46,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143233522] [2021-07-09 18:22:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:22:46,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:46,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143233522] [2021-07-09 18:22:46,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143233522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:46,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625185336] [2021-07-09 18:22:46,466 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:46,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:22:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:22:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:22:46,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625185336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:46,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:46,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 18:22:46,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363903459] [2021-07-09 18:22:46,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:22:46,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:46,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:22:46,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:46,562 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:46,967 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2021-07-09 18:22:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:22:46,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:47,095 INFO L225 Difference]: With dead ends: 37294 [2021-07-09 18:22:47,095 INFO L226 Difference]: Without dead ends: 37294 [2021-07-09 18:22:47,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2021-07-09 18:22:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2021-07-09 18:22:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2021-07-09 18:22:48,057 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2021-07-09 18:22:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:48,057 INFO L482 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2021-07-09 18:22:48,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2021-07-09 18:22:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:22:48,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:48,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:48,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:22:48,339 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 19 times [2021-07-09 18:22:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:48,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375321313] [2021-07-09 18:22:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:48,682 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-09 18:22:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:48,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:48,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375321313] [2021-07-09 18:22:48,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375321313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:48,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048816465] [2021-07-09 18:22:48,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:22:48,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:49,157 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:22:49,157 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:22:49,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:49,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:49,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:49,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:22:49,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:22:49,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:49,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:49,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:49,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:22:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:49,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048816465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:49,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:49,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:22:49,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980526632] [2021-07-09 18:22:49,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:22:49,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:49,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:22:49,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:22:49,322 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:51,145 INFO L93 Difference]: Finished difference Result 61929 states and 253070 transitions. [2021-07-09 18:22:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:22:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:22:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:51,393 INFO L225 Difference]: With dead ends: 61929 [2021-07-09 18:22:51,393 INFO L226 Difference]: Without dead ends: 61737 [2021-07-09 18:22:51,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1245.1ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:22:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61737 states. [2021-07-09 18:22:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61737 to 34859. [2021-07-09 18:22:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34859 states, 34858 states have (on average 4.136668770440071) internal successors, (144196), 34858 states have internal predecessors, (144196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34859 states to 34859 states and 144196 transitions. [2021-07-09 18:22:52,801 INFO L78 Accepts]: Start accepts. Automaton has 34859 states and 144196 transitions. Word has length 39 [2021-07-09 18:22:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:52,802 INFO L482 AbstractCegarLoop]: Abstraction has 34859 states and 144196 transitions. [2021-07-09 18:22:52,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 34859 states and 144196 transitions. [2021-07-09 18:22:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:22:52,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:52,911 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:53,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:22:53,112 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1529459447, now seen corresponding path program 20 times [2021-07-09 18:22:53,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:53,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634588821] [2021-07-09 18:22:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:53,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634588821] [2021-07-09 18:22:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634588821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348319019] [2021-07-09 18:22:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:53,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:53,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:22:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:53,659 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:22:53,660 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:22:53,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:53,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:53,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:53,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-09 18:22:53,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:22:53,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:53,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:53,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:53,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:22:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:53,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348319019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:53,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:53,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:22:53,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224281831] [2021-07-09 18:22:53,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:22:53,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:22:53,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:22:53,816 INFO L87 Difference]: Start difference. First operand 34859 states and 144196 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:54,086 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-09 18:22:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:55,709 INFO L93 Difference]: Finished difference Result 62927 states and 257215 transitions. [2021-07-09 18:22:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:22:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:22:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:56,135 INFO L225 Difference]: With dead ends: 62927 [2021-07-09 18:22:56,136 INFO L226 Difference]: Without dead ends: 62711 [2021-07-09 18:22:56,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1269.2ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:22:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62711 states. [2021-07-09 18:22:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62711 to 35009. [2021-07-09 18:22:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35009 states, 35008 states have (on average 4.135283363802559) internal successors, (144768), 35008 states have internal predecessors, (144768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35009 states to 35009 states and 144768 transitions. [2021-07-09 18:22:57,388 INFO L78 Accepts]: Start accepts. Automaton has 35009 states and 144768 transitions. Word has length 39 [2021-07-09 18:22:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:57,388 INFO L482 AbstractCegarLoop]: Abstraction has 35009 states and 144768 transitions. [2021-07-09 18:22:57,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 35009 states and 144768 transitions. [2021-07-09 18:22:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:22:57,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:57,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:57,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:22:57,679 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash -953652233, now seen corresponding path program 21 times [2021-07-09 18:22:57,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:57,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349664354] [2021-07-09 18:22:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:57,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349664354] [2021-07-09 18:22:57,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349664354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186360554] [2021-07-09 18:22:57,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:57,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:22:57,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:22:57,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:58,333 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-07-09 18:22:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:58,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:58,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:22:58,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:58,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-07-09 18:22:58,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:22:58,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:58,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-09 18:22:58,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:58,550 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:22:58,551 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:22:58,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:58,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:22:58,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:22:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:58,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186360554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:58,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:58,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:22:58,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220046168] [2021-07-09 18:22:58,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:22:58,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:58,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:22:58,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:22:58,620 INFO L87 Difference]: Start difference. First operand 35009 states and 144768 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:01,015 INFO L93 Difference]: Finished difference Result 64186 states and 261937 transitions. [2021-07-09 18:23:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:23:01,015 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:01,262 INFO L225 Difference]: With dead ends: 64186 [2021-07-09 18:23:01,262 INFO L226 Difference]: Without dead ends: 64076 [2021-07-09 18:23:01,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1523.8ms TimeCoverageRelationStatistics Valid=717, Invalid=3065, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:23:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64076 states. [2021-07-09 18:23:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64076 to 35529. [2021-07-09 18:23:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35529 states, 35528 states have (on average 4.1301790137356456) internal successors, (146737), 35528 states have internal predecessors, (146737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35529 states to 35529 states and 146737 transitions. [2021-07-09 18:23:02,500 INFO L78 Accepts]: Start accepts. Automaton has 35529 states and 146737 transitions. Word has length 39 [2021-07-09 18:23:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:02,500 INFO L482 AbstractCegarLoop]: Abstraction has 35529 states and 146737 transitions. [2021-07-09 18:23:02,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35529 states and 146737 transitions. [2021-07-09 18:23:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:02,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:02,578 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:02,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:02,778 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2033805687, now seen corresponding path program 22 times [2021-07-09 18:23:02,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:02,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73754816] [2021-07-09 18:23:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:03,179 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-07-09 18:23:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:03,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73754816] [2021-07-09 18:23:03,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73754816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695814761] [2021-07-09 18:23:03,308 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:03,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:03,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:03,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:03,543 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:23:03,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:03,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:23:03,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:23:03,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:03,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:23:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695814761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:03,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:03,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:03,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148231884] [2021-07-09 18:23:03,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:03,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:03,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:03,706 INFO L87 Difference]: Start difference. First operand 35529 states and 146737 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:04,623 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-09 18:23:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:05,670 INFO L93 Difference]: Finished difference Result 81268 states and 331701 transitions. [2021-07-09 18:23:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:23:05,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:06,005 INFO L225 Difference]: With dead ends: 81268 [2021-07-09 18:23:06,005 INFO L226 Difference]: Without dead ends: 81213 [2021-07-09 18:23:06,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1270.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:23:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81213 states. [2021-07-09 18:23:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81213 to 35699. [2021-07-09 18:23:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35699 states, 35698 states have (on average 4.142865146506807) internal successors, (147892), 35698 states have internal predecessors, (147892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35699 states to 35699 states and 147892 transitions. [2021-07-09 18:23:07,788 INFO L78 Accepts]: Start accepts. Automaton has 35699 states and 147892 transitions. Word has length 39 [2021-07-09 18:23:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:07,788 INFO L482 AbstractCegarLoop]: Abstraction has 35699 states and 147892 transitions. [2021-07-09 18:23:07,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 35699 states and 147892 transitions. [2021-07-09 18:23:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:07,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:07,889 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:08,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:23:08,101 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1355985241, now seen corresponding path program 23 times [2021-07-09 18:23:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:08,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916503330] [2021-07-09 18:23:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:08,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:08,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916503330] [2021-07-09 18:23:08,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916503330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:08,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102218349] [2021-07-09 18:23:08,459 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:08,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:23:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:23:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:08,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-09 18:23:08,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:08,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:50 [2021-07-09 18:23:08,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:08,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:23:08,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:23:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:23:08,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:08,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:08,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:23:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:09,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102218349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:09,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:09,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:23:09,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293558617] [2021-07-09 18:23:09,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:23:09,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:23:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:23:09,003 INFO L87 Difference]: Start difference. First operand 35699 states and 147892 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:09,250 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-07-09 18:23:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:12,604 INFO L93 Difference]: Finished difference Result 67639 states and 276324 transitions. [2021-07-09 18:23:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:23:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:12,861 INFO L225 Difference]: With dead ends: 67639 [2021-07-09 18:23:12,861 INFO L226 Difference]: Without dead ends: 67418 [2021-07-09 18:23:12,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2539.1ms TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:23:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67418 states. [2021-07-09 18:23:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67418 to 36148. [2021-07-09 18:23:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36148 states, 36147 states have (on average 4.136857830525355) internal successors, (149535), 36147 states have internal predecessors, (149535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36148 states to 36148 states and 149535 transitions. [2021-07-09 18:23:14,253 INFO L78 Accepts]: Start accepts. Automaton has 36148 states and 149535 transitions. Word has length 39 [2021-07-09 18:23:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:14,253 INFO L482 AbstractCegarLoop]: Abstraction has 36148 states and 149535 transitions. [2021-07-09 18:23:14,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 36148 states and 149535 transitions. [2021-07-09 18:23:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:14,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:14,333 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:14,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:14,537 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:14,537 INFO L82 PathProgramCache]: Analyzing trace with hash -768675797, now seen corresponding path program 24 times [2021-07-09 18:23:14,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:14,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774964866] [2021-07-09 18:23:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:15,005 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-07-09 18:23:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:15,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:15,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774964866] [2021-07-09 18:23:15,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774964866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:15,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6333698] [2021-07-09 18:23:15,184 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:15,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:23:15,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:15,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:23:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:15,396 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:15,396 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:23:15,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:23:15,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:15,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:23:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:15,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6333698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:15,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:15,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:15,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580879140] [2021-07-09 18:23:15,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:15,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:15,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:15,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:15,507 INFO L87 Difference]: Start difference. First operand 36148 states and 149535 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:17,299 INFO L93 Difference]: Finished difference Result 77150 states and 313355 transitions. [2021-07-09 18:23:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:17,613 INFO L225 Difference]: With dead ends: 77150 [2021-07-09 18:23:17,613 INFO L226 Difference]: Without dead ends: 76966 [2021-07-09 18:23:17,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1068.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:23:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76966 states. [2021-07-09 18:23:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76966 to 35834. [2021-07-09 18:23:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35834 states, 35833 states have (on average 4.141601317221555) internal successors, (148406), 35833 states have internal predecessors, (148406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35834 states to 35834 states and 148406 transitions. [2021-07-09 18:23:19,068 INFO L78 Accepts]: Start accepts. Automaton has 35834 states and 148406 transitions. Word has length 39 [2021-07-09 18:23:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:19,069 INFO L482 AbstractCegarLoop]: Abstraction has 35834 states and 148406 transitions. [2021-07-09 18:23:19,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 35834 states and 148406 transitions. [2021-07-09 18:23:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:19,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:19,150 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:19,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:23:19,352 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash -789200017, now seen corresponding path program 25 times [2021-07-09 18:23:19,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:19,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35237099] [2021-07-09 18:23:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:19,745 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-07-09 18:23:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:19,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:19,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35237099] [2021-07-09 18:23:19,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35237099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:19,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797597106] [2021-07-09 18:23:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:20,167 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:20,167 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:23:20,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:20,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:20,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:20,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:23:20,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:20,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:20,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:20,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:20,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:23:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:20,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797597106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:20,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:20,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:20,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651427697] [2021-07-09 18:23:20,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:20,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:20,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:20,262 INFO L87 Difference]: Start difference. First operand 35834 states and 148406 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:21,822 INFO L93 Difference]: Finished difference Result 64096 states and 261990 transitions. [2021-07-09 18:23:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:21,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:22,219 INFO L225 Difference]: With dead ends: 64096 [2021-07-09 18:23:22,219 INFO L226 Difference]: Without dead ends: 63848 [2021-07-09 18:23:22,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1224.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:23:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63848 states. [2021-07-09 18:23:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63848 to 36020. [2021-07-09 18:23:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36020 states, 36019 states have (on average 4.13964851883728) internal successors, (149106), 36019 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36020 states to 36020 states and 149106 transitions. [2021-07-09 18:23:23,647 INFO L78 Accepts]: Start accepts. Automaton has 36020 states and 149106 transitions. Word has length 39 [2021-07-09 18:23:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:23,647 INFO L482 AbstractCegarLoop]: Abstraction has 36020 states and 149106 transitions. [2021-07-09 18:23:23,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 36020 states and 149106 transitions. [2021-07-09 18:23:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:23,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:23,744 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:23,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:23,945 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900731, now seen corresponding path program 26 times [2021-07-09 18:23:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:23,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521114433] [2021-07-09 18:23:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:24,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:24,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521114433] [2021-07-09 18:23:24,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521114433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:24,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047768313] [2021-07-09 18:23:24,273 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:24,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:24,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:23:24,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:24,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:24,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:24,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:23:24,550 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:24,550 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:23:24,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:24,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:24,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:24,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:23:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047768313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:24,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:24,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828683295] [2021-07-09 18:23:24,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:24,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:24,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:24,595 INFO L87 Difference]: Start difference. First operand 36020 states and 149106 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:26,782 INFO L93 Difference]: Finished difference Result 81375 states and 330962 transitions. [2021-07-09 18:23:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:27,312 INFO L225 Difference]: With dead ends: 81375 [2021-07-09 18:23:27,312 INFO L226 Difference]: Without dead ends: 81223 [2021-07-09 18:23:27,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:23:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81223 states. [2021-07-09 18:23:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81223 to 36090. [2021-07-09 18:23:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36090 states, 36089 states have (on average 4.140486020671118) internal successors, (149426), 36089 states have internal predecessors, (149426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36090 states to 36090 states and 149426 transitions. [2021-07-09 18:23:28,779 INFO L78 Accepts]: Start accepts. Automaton has 36090 states and 149426 transitions. Word has length 39 [2021-07-09 18:23:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:28,779 INFO L482 AbstractCegarLoop]: Abstraction has 36090 states and 149426 transitions. [2021-07-09 18:23:28,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 36090 states and 149426 transitions. [2021-07-09 18:23:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:28,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:28,865 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:29,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:23:29,066 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:29,067 INFO L82 PathProgramCache]: Analyzing trace with hash -908979985, now seen corresponding path program 27 times [2021-07-09 18:23:29,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:29,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655955615] [2021-07-09 18:23:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:29,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655955615] [2021-07-09 18:23:29,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655955615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:29,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721452448] [2021-07-09 18:23:29,412 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:29,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:23:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:23:29,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:29,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:29,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:23:29,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:29,951 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-07-09 18:23:29,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:29,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:29,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:74 [2021-07-09 18:23:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:30,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-07-09 18:23:30,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:30,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:30,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 38 [2021-07-09 18:23:30,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-07-09 18:23:30,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:30,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:30,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-07-09 18:23:30,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:30,077 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.4 percent of original size [2021-07-09 18:23:30,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:23:30,078 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:65 [2021-07-09 18:23:30,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:30,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:23:30,155 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:30,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:30,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:30,195 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:23:30,196 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:30,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:30,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:23:30,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:95 [2021-07-09 18:23:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:30,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721452448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:30,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:30,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:23:30,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082869752] [2021-07-09 18:23:30,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:23:30,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:30,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:23:30,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:23:30,428 INFO L87 Difference]: Start difference. First operand 36090 states and 149426 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:33,486 INFO L93 Difference]: Finished difference Result 64235 states and 260613 transitions. [2021-07-09 18:23:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:23:33,486 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:33,743 INFO L225 Difference]: With dead ends: 64235 [2021-07-09 18:23:33,743 INFO L226 Difference]: Without dead ends: 64063 [2021-07-09 18:23:33,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 2451.6ms TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:23:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2021-07-09 18:23:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 36112. [2021-07-09 18:23:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36112 states, 36111 states have (on average 4.140289662429731) internal successors, (149510), 36111 states have internal predecessors, (149510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36112 states to 36112 states and 149510 transitions. [2021-07-09 18:23:34,946 INFO L78 Accepts]: Start accepts. Automaton has 36112 states and 149510 transitions. Word has length 39 [2021-07-09 18:23:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:34,946 INFO L482 AbstractCegarLoop]: Abstraction has 36112 states and 149510 transitions. [2021-07-09 18:23:34,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 36112 states and 149510 transitions. [2021-07-09 18:23:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:35,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:35,033 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:35,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:35,233 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:35,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1386806843, now seen corresponding path program 28 times [2021-07-09 18:23:35,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:35,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41669771] [2021-07-09 18:23:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:35,539 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-09 18:23:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:35,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41669771] [2021-07-09 18:23:35,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41669771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126598341] [2021-07-09 18:23:35,787 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:35,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:35,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:35,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:36,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:23:36,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:36,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:36,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:36,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:23:36,070 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:36,070 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:23:36,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:36,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:36,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:36,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:23:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:36,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126598341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:36,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:36,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:36,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947343809] [2021-07-09 18:23:36,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:36,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:36,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:36,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:36,125 INFO L87 Difference]: Start difference. First operand 36112 states and 149510 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:38,129 INFO L93 Difference]: Finished difference Result 81804 states and 333218 transitions. [2021-07-09 18:23:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:23:38,129 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:38,456 INFO L225 Difference]: With dead ends: 81804 [2021-07-09 18:23:38,456 INFO L226 Difference]: Without dead ends: 81722 [2021-07-09 18:23:38,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1309.5ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:23:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81722 states. [2021-07-09 18:23:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81722 to 36088. [2021-07-09 18:23:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36088 states, 36087 states have (on average 4.143431152492587) internal successors, (149524), 36087 states have internal predecessors, (149524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36088 states to 36088 states and 149524 transitions. [2021-07-09 18:23:39,919 INFO L78 Accepts]: Start accepts. Automaton has 36088 states and 149524 transitions. Word has length 39 [2021-07-09 18:23:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:39,920 INFO L482 AbstractCegarLoop]: Abstraction has 36088 states and 149524 transitions. [2021-07-09 18:23:39,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 36088 states and 149524 transitions. [2021-07-09 18:23:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:40,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:40,001 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:40,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:23:40,202 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash -835335761, now seen corresponding path program 29 times [2021-07-09 18:23:40,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:40,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496599932] [2021-07-09 18:23:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:40,515 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-09 18:23:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:40,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:40,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496599932] [2021-07-09 18:23:40,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496599932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:40,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281956650] [2021-07-09 18:23:40,711 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:40,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:23:40,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:40,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:40,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:23:40,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:40,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:40,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:40,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-07-09 18:23:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:23:41,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:41,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:41,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:41,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-07-09 18:23:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:41,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:41,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:23:41,151 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:41,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:41,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:41,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-09 18:23:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:41,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281956650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:41,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:41,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:23:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287821346] [2021-07-09 18:23:41,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:23:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:23:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:23:41,213 INFO L87 Difference]: Start difference. First operand 36088 states and 149524 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:45,025 INFO L93 Difference]: Finished difference Result 69670 states and 283586 transitions. [2021-07-09 18:23:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:23:45,025 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:45,304 INFO L225 Difference]: With dead ends: 69670 [2021-07-09 18:23:45,304 INFO L226 Difference]: Without dead ends: 69241 [2021-07-09 18:23:45,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2752.5ms TimeCoverageRelationStatistics Valid=919, Invalid=5723, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:23:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69241 states. [2021-07-09 18:23:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69241 to 36951. [2021-07-09 18:23:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36951 states, 36950 states have (on average 4.1375372124492555) internal successors, (152882), 36950 states have internal predecessors, (152882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36951 states to 36951 states and 152882 transitions. [2021-07-09 18:23:46,650 INFO L78 Accepts]: Start accepts. Automaton has 36951 states and 152882 transitions. Word has length 39 [2021-07-09 18:23:46,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:46,650 INFO L482 AbstractCegarLoop]: Abstraction has 36951 states and 152882 transitions. [2021-07-09 18:23:46,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand 36951 states and 152882 transitions. [2021-07-09 18:23:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:46,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:46,735 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:46,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:46,936 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash 976519855, now seen corresponding path program 30 times [2021-07-09 18:23:46,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:46,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468586458] [2021-07-09 18:23:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:47,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468586458] [2021-07-09 18:23:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468586458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010226928] [2021-07-09 18:23:47,218 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:47,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:23:47,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:47,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:23:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:47,412 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:47,412 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:23:47,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:47,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:47,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:47,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-09 18:23:47,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:23:47,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:47,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:47,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:47,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:23:47,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:47,488 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:23:47,490 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:47,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:47,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:47,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:23:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:47,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010226928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:47,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:47,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:23:47,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769370465] [2021-07-09 18:23:47,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:23:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:47,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:23:47,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:23:47,537 INFO L87 Difference]: Start difference. First operand 36951 states and 152882 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:49,838 INFO L93 Difference]: Finished difference Result 69773 states and 285641 transitions. [2021-07-09 18:23:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:23:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:50,108 INFO L225 Difference]: With dead ends: 69773 [2021-07-09 18:23:50,108 INFO L226 Difference]: Without dead ends: 69718 [2021-07-09 18:23:50,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1254.5ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:23:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69718 states. [2021-07-09 18:23:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69718 to 37115. [2021-07-09 18:23:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37115 states, 37114 states have (on average 4.138114997036159) internal successors, (153582), 37114 states have internal predecessors, (153582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37115 states to 37115 states and 153582 transitions. [2021-07-09 18:23:51,511 INFO L78 Accepts]: Start accepts. Automaton has 37115 states and 153582 transitions. Word has length 39 [2021-07-09 18:23:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:51,511 INFO L482 AbstractCegarLoop]: Abstraction has 37115 states and 153582 transitions. [2021-07-09 18:23:51,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 37115 states and 153582 transitions. [2021-07-09 18:23:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:51,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:51,597 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:51,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:51,798 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash 747788741, now seen corresponding path program 31 times [2021-07-09 18:23:51,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:51,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614285478] [2021-07-09 18:23:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:52,061 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-07-09 18:23:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:52,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614285478] [2021-07-09 18:23:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614285478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683150748] [2021-07-09 18:23:52,354 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:52,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:52,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:52,574 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:52,575 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:23:52,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:52,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:52,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:52,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-09 18:23:52,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:52,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:52,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:52,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:52,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:23:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:52,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683150748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:52,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:52,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:52,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274767242] [2021-07-09 18:23:52,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:52,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:52,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:52,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:52,682 INFO L87 Difference]: Start difference. First operand 37115 states and 153582 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:54,732 INFO L93 Difference]: Finished difference Result 79233 states and 321882 transitions. [2021-07-09 18:23:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:23:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:55,050 INFO L225 Difference]: With dead ends: 79233 [2021-07-09 18:23:55,050 INFO L226 Difference]: Without dead ends: 79017 [2021-07-09 18:23:55,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1159.3ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:23:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79017 states. [2021-07-09 18:23:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79017 to 36721. [2021-07-09 18:23:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 36720 states have (on average 4.142184095860566) internal successors, (152101), 36720 states have internal predecessors, (152101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152101 transitions. [2021-07-09 18:23:56,487 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152101 transitions. Word has length 39 [2021-07-09 18:23:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:56,487 INFO L482 AbstractCegarLoop]: Abstraction has 36721 states and 152101 transitions. [2021-07-09 18:23:56,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152101 transitions. [2021-07-09 18:23:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:56,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:56,569 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:56,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:23:56,770 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1618032043, now seen corresponding path program 32 times [2021-07-09 18:23:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:56,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189580315] [2021-07-09 18:23:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:57,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:57,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189580315] [2021-07-09 18:23:57,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189580315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:57,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764823058] [2021-07-09 18:23:57,294 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:57,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:57,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:57,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:57,535 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:57,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:23:57,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:57,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:57,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:57,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:23:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:57,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:57,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:57,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:57,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:23:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:57,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764823058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:57,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:57,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:57,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642219148] [2021-07-09 18:23:57,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:57,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:57,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:57,613 INFO L87 Difference]: Start difference. First operand 36721 states and 152101 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:59,270 INFO L93 Difference]: Finished difference Result 65192 states and 266420 transitions. [2021-07-09 18:23:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:59,666 INFO L225 Difference]: With dead ends: 65192 [2021-07-09 18:23:59,666 INFO L226 Difference]: Without dead ends: 64944 [2021-07-09 18:23:59,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1138.5ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:23:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64944 states. [2021-07-09 18:24:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64944 to 36907. [2021-07-09 18:24:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36907 states, 36906 states have (on average 4.140275293990137) internal successors, (152801), 36906 states have internal predecessors, (152801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36907 states to 36907 states and 152801 transitions. [2021-07-09 18:24:01,005 INFO L78 Accepts]: Start accepts. Automaton has 36907 states and 152801 transitions. Word has length 39 [2021-07-09 18:24:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:01,005 INFO L482 AbstractCegarLoop]: Abstraction has 36907 states and 152801 transitions. [2021-07-09 18:24:01,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 36907 states and 152801 transitions. [2021-07-09 18:24:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:01,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:01,094 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:01,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:01,305 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 980871553, now seen corresponding path program 33 times [2021-07-09 18:24:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786538028] [2021-07-09 18:24:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:01,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786538028] [2021-07-09 18:24:01,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786538028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:01,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903613692] [2021-07-09 18:24:01,613 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:01,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:24:01,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:01,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:24:01,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:01,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:01,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:24:01,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:01,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:01,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:01,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:64 [2021-07-09 18:24:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:02,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:24:02,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:02,115 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:24:02,115 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-07-09 18:24:02,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:02,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:02,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:24:02,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:02,142 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:24:02,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-07-09 18:24:02,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:02,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:02,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 18:24:02,410 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:233, output treesize:216 [2021-07-09 18:24:02,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:02,608 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:02,609 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:02,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:02,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:02,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-09 18:24:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:02,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903613692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:02,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:02,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:24:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754220692] [2021-07-09 18:24:02,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:24:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:24:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:24:02,740 INFO L87 Difference]: Start difference. First operand 36907 states and 152801 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:05,082 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 71 [2021-07-09 18:24:05,526 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-09 18:24:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:07,427 INFO L93 Difference]: Finished difference Result 77297 states and 311441 transitions. [2021-07-09 18:24:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:24:07,427 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:07,732 INFO L225 Difference]: With dead ends: 77297 [2021-07-09 18:24:07,733 INFO L226 Difference]: Without dead ends: 76962 [2021-07-09 18:24:07,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 3765.1ms TimeCoverageRelationStatistics Valid=1240, Invalid=6242, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:24:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76962 states. [2021-07-09 18:24:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76962 to 37046. [2021-07-09 18:24:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37046 states, 37045 states have (on average 4.137454447293832) internal successors, (153272), 37045 states have internal predecessors, (153272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37046 states to 37046 states and 153272 transitions. [2021-07-09 18:24:09,282 INFO L78 Accepts]: Start accepts. Automaton has 37046 states and 153272 transitions. Word has length 39 [2021-07-09 18:24:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:09,282 INFO L482 AbstractCegarLoop]: Abstraction has 37046 states and 153272 transitions. [2021-07-09 18:24:09,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 37046 states and 153272 transitions. [2021-07-09 18:24:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:09,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:09,359 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:09,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:24:09,559 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1184792299, now seen corresponding path program 34 times [2021-07-09 18:24:09,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:09,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593329611] [2021-07-09 18:24:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:09,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:09,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593329611] [2021-07-09 18:24:09,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593329611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:09,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343425348] [2021-07-09 18:24:09,871 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) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:09,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:09,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:09,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:10,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:10,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:24:10,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:10,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:24:10,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:24:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:10,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343425348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:10,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:10,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:10,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011223237] [2021-07-09 18:24:10,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:10,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:10,177 INFO L87 Difference]: Start difference. First operand 37046 states and 153272 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:11,985 INFO L93 Difference]: Finished difference Result 69957 states and 285446 transitions. [2021-07-09 18:24:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:24:11,986 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:12,244 INFO L225 Difference]: With dead ends: 69957 [2021-07-09 18:24:12,244 INFO L226 Difference]: Without dead ends: 69867 [2021-07-09 18:24:12,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:24:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69867 states. [2021-07-09 18:24:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69867 to 37170. [2021-07-09 18:24:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37170 states, 37169 states have (on average 4.137749199601819) internal successors, (153796), 37169 states have internal predecessors, (153796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37170 states to 37170 states and 153796 transitions. [2021-07-09 18:24:13,584 INFO L78 Accepts]: Start accepts. Automaton has 37170 states and 153796 transitions. Word has length 39 [2021-07-09 18:24:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:13,584 INFO L482 AbstractCegarLoop]: Abstraction has 37170 states and 153796 transitions. [2021-07-09 18:24:13,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 37170 states and 153796 transitions. [2021-07-09 18:24:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:13,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:13,667 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:13,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:13,868 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash -946859157, now seen corresponding path program 35 times [2021-07-09 18:24:13,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:13,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789865959] [2021-07-09 18:24:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:14,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789865959] [2021-07-09 18:24:14,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789865959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008440006] [2021-07-09 18:24:14,182 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 [2021-07-09 18:24:14,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:24:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:24:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:14,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:14,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:14,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:14,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:14,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-09 18:24:14,737 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-09 18:24:14,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:14,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-07-09 18:24:14,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:14,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:14,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:14,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:37 [2021-07-09 18:24:14,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:14,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:14,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:24:14,890 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:14,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:14,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:14,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:24:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:14,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008440006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:14,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:14,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:24:14,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633127353] [2021-07-09 18:24:14,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:24:14,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:14,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:24:14,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:24:14,958 INFO L87 Difference]: Start difference. First operand 37170 states and 153796 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:21,792 INFO L93 Difference]: Finished difference Result 120785 states and 490537 transitions. [2021-07-09 18:24:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:24:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:22,699 INFO L225 Difference]: With dead ends: 120785 [2021-07-09 18:24:22,700 INFO L226 Difference]: Without dead ends: 120491 [2021-07-09 18:24:22,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 4054.1ms TimeCoverageRelationStatistics Valid=1442, Invalid=7114, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:24:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120491 states. [2021-07-09 18:24:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120491 to 36914. [2021-07-09 18:24:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36914 states, 36913 states have (on average 4.138812884349687) internal successors, (152776), 36913 states have internal predecessors, (152776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36914 states to 36914 states and 152776 transitions. [2021-07-09 18:24:24,910 INFO L78 Accepts]: Start accepts. Automaton has 36914 states and 152776 transitions. Word has length 39 [2021-07-09 18:24:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:24,910 INFO L482 AbstractCegarLoop]: Abstraction has 36914 states and 152776 transitions. [2021-07-09 18:24:24,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 36914 states and 152776 transitions. [2021-07-09 18:24:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:25,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:25,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:25,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:25,211 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 475346227, now seen corresponding path program 36 times [2021-07-09 18:24:25,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:25,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867800086] [2021-07-09 18:24:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:25,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867800086] [2021-07-09 18:24:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867800086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727728653] [2021-07-09 18:24:25,501 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:25,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:24:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:24:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:25,929 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:24:26,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:24:26,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:26,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:26,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:60 [2021-07-09 18:24:26,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-09 18:24:26,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:26,330 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:24:26,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:24:26,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:26,343 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:24:26,344 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:24:26,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:26,374 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:24:26,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 46 [2021-07-09 18:24:26,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:26,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:24:26,451 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:149 [2021-07-09 18:24:26,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,661 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:26,662 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:26,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:26,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:24:26,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:26,738 INFO L628 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2021-07-09 18:24:26,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:26,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:41 [2021-07-09 18:24:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:26,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727728653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:26,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:26,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:24:26,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618874968] [2021-07-09 18:24:26,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:24:26,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:26,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:24:26,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:24:26,867 INFO L87 Difference]: Start difference. First operand 36914 states and 152776 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:29,934 INFO L93 Difference]: Finished difference Result 72719 states and 295712 transitions. [2021-07-09 18:24:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:24:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:30,224 INFO L225 Difference]: With dead ends: 72719 [2021-07-09 18:24:30,225 INFO L226 Difference]: Without dead ends: 72609 [2021-07-09 18:24:30,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2674.1ms TimeCoverageRelationStatistics Valid=875, Invalid=3681, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:24:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72609 states. [2021-07-09 18:24:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72609 to 37105. [2021-07-09 18:24:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37105 states, 37104 states have (on average 4.1379905131522206) internal successors, (153536), 37104 states have internal predecessors, (153536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37105 states to 37105 states and 153536 transitions. [2021-07-09 18:24:31,635 INFO L78 Accepts]: Start accepts. Automaton has 37105 states and 153536 transitions. Word has length 39 [2021-07-09 18:24:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:31,635 INFO L482 AbstractCegarLoop]: Abstraction has 37105 states and 153536 transitions. [2021-07-09 18:24:31,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 37105 states and 153536 transitions. [2021-07-09 18:24:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:31,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:31,717 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:31,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:24:31,917 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1206490683, now seen corresponding path program 37 times [2021-07-09 18:24:31,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:31,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554167271] [2021-07-09 18:24:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:32,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:32,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554167271] [2021-07-09 18:24:32,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554167271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:32,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442592214] [2021-07-09 18:24:32,177 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:32,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:32,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:32,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:32,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:32,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:24:32,419 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:32,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:24:32,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:32,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:32,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:32,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-09 18:24:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:32,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442592214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:32,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:32,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811826272] [2021-07-09 18:24:32,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:32,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:32,476 INFO L87 Difference]: Start difference. First operand 37105 states and 153536 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:34,468 INFO L93 Difference]: Finished difference Result 87448 states and 357230 transitions. [2021-07-09 18:24:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:24:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:34,994 INFO L225 Difference]: With dead ends: 87448 [2021-07-09 18:24:34,994 INFO L226 Difference]: Without dead ends: 87393 [2021-07-09 18:24:34,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:24:35,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87393 states. [2021-07-09 18:24:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87393 to 37362. [2021-07-09 18:24:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37362 states, 37361 states have (on average 4.1416450309145905) internal successors, (154736), 37361 states have internal predecessors, (154736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37362 states to 37362 states and 154736 transitions. [2021-07-09 18:24:36,568 INFO L78 Accepts]: Start accepts. Automaton has 37362 states and 154736 transitions. Word has length 39 [2021-07-09 18:24:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:36,568 INFO L482 AbstractCegarLoop]: Abstraction has 37362 states and 154736 transitions. [2021-07-09 18:24:36,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37362 states and 154736 transitions. [2021-07-09 18:24:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:36,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:36,652 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:36,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:24:36,857 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1832087599, now seen corresponding path program 38 times [2021-07-09 18:24:36,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:36,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118945553] [2021-07-09 18:24:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:37,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118945553] [2021-07-09 18:24:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118945553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336599578] [2021-07-09 18:24:37,119 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:37,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:37,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:37,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:37,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:37,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:24:37,392 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:37,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:24:37,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:37,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:24:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:37,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336599578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:37,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:37,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:37,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451047435] [2021-07-09 18:24:37,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:37,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:37,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:37,614 INFO L87 Difference]: Start difference. First operand 37362 states and 154736 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:39,009 INFO L93 Difference]: Finished difference Result 73280 states and 301017 transitions. [2021-07-09 18:24:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:24:39,009 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:39,294 INFO L225 Difference]: With dead ends: 73280 [2021-07-09 18:24:39,295 INFO L226 Difference]: Without dead ends: 73225 [2021-07-09 18:24:39,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:24:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73225 states. [2021-07-09 18:24:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73225 to 37610. [2021-07-09 18:24:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37610 states, 37609 states have (on average 4.143263580525938) internal successors, (155824), 37609 states have internal predecessors, (155824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37610 states to 37610 states and 155824 transitions. [2021-07-09 18:24:40,658 INFO L78 Accepts]: Start accepts. Automaton has 37610 states and 155824 transitions. Word has length 39 [2021-07-09 18:24:40,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:40,658 INFO L482 AbstractCegarLoop]: Abstraction has 37610 states and 155824 transitions. [2021-07-09 18:24:40,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 37610 states and 155824 transitions. [2021-07-09 18:24:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:40,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:40,741 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:40,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:24:40,941 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash -973527573, now seen corresponding path program 39 times [2021-07-09 18:24:40,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:40,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953751490] [2021-07-09 18:24:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:41,246 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-09 18:24:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:41,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:41,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953751490] [2021-07-09 18:24:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953751490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:41,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228579755] [2021-07-09 18:24:41,470 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:41,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:24:41,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:41,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:24:41,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:41,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:24:41,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:41,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:41,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:41,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:66 [2021-07-09 18:24:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:41,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:41,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:24:41,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:41,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:41,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:24:41,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:41,880 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:24:41,880 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:24:41,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:41,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:41,888 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 18:24:41,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2021-07-09 18:24:41,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:41,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:41,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:24:41,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:245, output treesize:189 [2021-07-09 18:24:42,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:42,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:42,058 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:42,152 INFO L628 ElimStorePlain]: treesize reduction 27, result has 83.5 percent of original size [2021-07-09 18:24:42,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:42,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:42,161 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:42,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:42,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:42,216 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:42,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:42,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:24:42,271 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:165, output treesize:152 [2021-07-09 18:24:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:42,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228579755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:42,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:42,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:24:42,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066293113] [2021-07-09 18:24:42,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:24:42,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:24:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:24:42,503 INFO L87 Difference]: Start difference. First operand 37610 states and 155824 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:43,350 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-09 18:24:44,445 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 18:24:45,422 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-09 18:24:45,749 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-07-09 18:24:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:46,907 INFO L93 Difference]: Finished difference Result 72090 states and 292918 transitions. [2021-07-09 18:24:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:24:46,908 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:47,190 INFO L225 Difference]: With dead ends: 72090 [2021-07-09 18:24:47,190 INFO L226 Difference]: Without dead ends: 71980 [2021-07-09 18:24:47,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 3399.9ms TimeCoverageRelationStatistics Valid=850, Invalid=3572, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:24:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71980 states. [2021-07-09 18:24:48,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71980 to 37688. [2021-07-09 18:24:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37688 states, 37687 states have (on average 4.1424894525963865) internal successors, (156118), 37687 states have internal predecessors, (156118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37688 states to 37688 states and 156118 transitions. [2021-07-09 18:24:48,585 INFO L78 Accepts]: Start accepts. Automaton has 37688 states and 156118 transitions. Word has length 39 [2021-07-09 18:24:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:48,585 INFO L482 AbstractCegarLoop]: Abstraction has 37688 states and 156118 transitions. [2021-07-09 18:24:48,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 37688 states and 156118 transitions. [2021-07-09 18:24:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:48,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:48,982 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:49,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:49,183 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1451354431, now seen corresponding path program 40 times [2021-07-09 18:24:49,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:49,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123941484] [2021-07-09 18:24:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:49,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:49,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123941484] [2021-07-09 18:24:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123941484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:49,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682023873] [2021-07-09 18:24:49,462 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:49,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:49,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:49,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:49,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:49,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:24:49,742 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:49,742 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:24:49,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:24:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:49,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682023873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:49,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:49,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509013366] [2021-07-09 18:24:49,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:49,787 INFO L87 Difference]: Start difference. First operand 37688 states and 156118 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:52,261 INFO L93 Difference]: Finished difference Result 86865 states and 355556 transitions. [2021-07-09 18:24:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:24:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:52,679 INFO L225 Difference]: With dead ends: 86865 [2021-07-09 18:24:52,679 INFO L226 Difference]: Without dead ends: 86810 [2021-07-09 18:24:52,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1140.0ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:24:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86810 states. [2021-07-09 18:24:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86810 to 37742. [2021-07-09 18:24:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37742 states, 37741 states have (on average 4.146207042738666) internal successors, (156482), 37741 states have internal predecessors, (156482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37742 states to 37742 states and 156482 transitions. [2021-07-09 18:24:54,441 INFO L78 Accepts]: Start accepts. Automaton has 37742 states and 156482 transitions. Word has length 39 [2021-07-09 18:24:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:54,441 INFO L482 AbstractCegarLoop]: Abstraction has 37742 states and 156482 transitions. [2021-07-09 18:24:54,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 37742 states and 156482 transitions. [2021-07-09 18:24:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:54,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:54,537 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:54,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 18:24:54,738 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash -653921383, now seen corresponding path program 41 times [2021-07-09 18:24:54,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:54,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105633179] [2021-07-09 18:24:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:55,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:55,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105633179] [2021-07-09 18:24:55,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105633179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:55,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476280200] [2021-07-09 18:24:55,064 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:55,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:24:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:24:55,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:55,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 49 [2021-07-09 18:24:55,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:55,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:55,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:50 [2021-07-09 18:24:55,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:24:55,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:55,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:55,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:24:55,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:55,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:55,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:55,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:24:55,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:55,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:55,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:55,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:24:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:55,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476280200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:55,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:55,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:24:55,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699188901] [2021-07-09 18:24:55,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:24:55,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:24:55,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:24:55,626 INFO L87 Difference]: Start difference. First operand 37742 states and 156482 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:59,336 INFO L93 Difference]: Finished difference Result 68588 states and 279888 transitions. [2021-07-09 18:24:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:24:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:59,599 INFO L225 Difference]: With dead ends: 68588 [2021-07-09 18:24:59,599 INFO L226 Difference]: Without dead ends: 68367 [2021-07-09 18:24:59,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2521.2ms TimeCoverageRelationStatistics Valid=756, Invalid=4356, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:24:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68367 states. [2021-07-09 18:25:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68367 to 38069. [2021-07-09 18:25:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38069 states, 38068 states have (on average 4.141194704213513) internal successors, (157647), 38068 states have internal predecessors, (157647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38069 states to 38069 states and 157647 transitions. [2021-07-09 18:25:00,997 INFO L78 Accepts]: Start accepts. Automaton has 38069 states and 157647 transitions. Word has length 39 [2021-07-09 18:25:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:00,997 INFO L482 AbstractCegarLoop]: Abstraction has 38069 states and 157647 transitions. [2021-07-09 18:25:00,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 38069 states and 157647 transitions. [2021-07-09 18:25:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:01,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:01,086 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:01,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:01,287 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1516384875, now seen corresponding path program 42 times [2021-07-09 18:25:01,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:01,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601407784] [2021-07-09 18:25:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:01,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:01,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601407784] [2021-07-09 18:25:01,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601407784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:01,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931806319] [2021-07-09 18:25:01,608 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:01,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:25:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:01,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:25:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:02,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:02,106 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:25:02,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:02,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:02,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:02,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:28 [2021-07-09 18:25:02,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-09 18:25:02,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:02,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:02,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:02,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-09 18:25:02,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:02,311 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:02,312 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:02,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:02,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:02,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:51 [2021-07-09 18:25:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:02,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931806319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:02,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:02,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-09 18:25:02,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16330818] [2021-07-09 18:25:02,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:25:02,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:25:02,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:25:02,435 INFO L87 Difference]: Start difference. First operand 38069 states and 157647 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:03,458 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-09 18:25:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:07,084 INFO L93 Difference]: Finished difference Result 76057 states and 306680 transitions. [2021-07-09 18:25:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:25:07,084 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:07,439 INFO L225 Difference]: With dead ends: 76057 [2021-07-09 18:25:07,439 INFO L226 Difference]: Without dead ends: 75706 [2021-07-09 18:25:07,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3284.4ms TimeCoverageRelationStatistics Valid=992, Invalid=5980, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:25:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75706 states. [2021-07-09 18:25:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75706 to 37904. [2021-07-09 18:25:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37904 states, 37903 states have (on average 4.142891064031871) internal successors, (157028), 37903 states have internal predecessors, (157028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37904 states to 37904 states and 157028 transitions. [2021-07-09 18:25:09,150 INFO L78 Accepts]: Start accepts. Automaton has 37904 states and 157028 transitions. Word has length 39 [2021-07-09 18:25:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:09,150 INFO L482 AbstractCegarLoop]: Abstraction has 37904 states and 157028 transitions. [2021-07-09 18:25:09,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 37904 states and 157028 transitions. [2021-07-09 18:25:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:09,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:09,240 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:09,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:25:09,441 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:09,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1495860655, now seen corresponding path program 43 times [2021-07-09 18:25:09,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:09,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191602998] [2021-07-09 18:25:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:10,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:10,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191602998] [2021-07-09 18:25:10,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191602998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:10,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479527751] [2021-07-09 18:25:10,072 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:10,327 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:25:10,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:10,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:10,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:10,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-09 18:25:10,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:25:10,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:10,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:10,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:10,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:25:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:10,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479527751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:10,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:10,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:10,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185898592] [2021-07-09 18:25:10,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:10,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:10,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:10,412 INFO L87 Difference]: Start difference. First operand 37904 states and 157028 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:12,170 INFO L93 Difference]: Finished difference Result 66378 states and 271263 transitions. [2021-07-09 18:25:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:25:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:12,595 INFO L225 Difference]: With dead ends: 66378 [2021-07-09 18:25:12,595 INFO L226 Difference]: Without dead ends: 66130 [2021-07-09 18:25:12,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1345.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:25:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66130 states. [2021-07-09 18:25:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66130 to 38078. [2021-07-09 18:25:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38078 states, 38077 states have (on average 4.141345168999659) internal successors, (157690), 38077 states have internal predecessors, (157690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38078 states to 38078 states and 157690 transitions. [2021-07-09 18:25:14,033 INFO L78 Accepts]: Start accepts. Automaton has 38078 states and 157690 transitions. Word has length 39 [2021-07-09 18:25:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:14,033 INFO L482 AbstractCegarLoop]: Abstraction has 38078 states and 157690 transitions. [2021-07-09 18:25:14,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 38078 states and 157690 transitions. [2021-07-09 18:25:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:14,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:14,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:14,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:14,374 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159941, now seen corresponding path program 44 times [2021-07-09 18:25:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:14,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620507607] [2021-07-09 18:25:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:14,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:14,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620507607] [2021-07-09 18:25:14,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620507607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:14,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908136720] [2021-07-09 18:25:14,694 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:14,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:14,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:25:14,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:14,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:14,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:14,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:25:14,975 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:14,976 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:25:14,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:14,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:14,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:14,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:25:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:15,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908136720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:15,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:15,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:15,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625132211] [2021-07-09 18:25:15,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:15,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:15,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:15,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:15,022 INFO L87 Difference]: Start difference. First operand 38078 states and 157690 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:15,634 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-07-09 18:25:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:17,166 INFO L93 Difference]: Finished difference Result 83791 states and 340816 transitions. [2021-07-09 18:25:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:25:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:17,522 INFO L225 Difference]: With dead ends: 83791 [2021-07-09 18:25:17,522 INFO L226 Difference]: Without dead ends: 83639 [2021-07-09 18:25:17,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1256.1ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:25:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83639 states. [2021-07-09 18:25:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83639 to 38148. [2021-07-09 18:25:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38148 states, 38147 states have (on average 4.14213437491808) internal successors, (158010), 38147 states have internal predecessors, (158010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38148 states to 38148 states and 158010 transitions. [2021-07-09 18:25:19,121 INFO L78 Accepts]: Start accepts. Automaton has 38148 states and 158010 transitions. Word has length 39 [2021-07-09 18:25:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:19,121 INFO L482 AbstractCegarLoop]: Abstraction has 38148 states and 158010 transitions. [2021-07-09 18:25:19,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 38148 states and 158010 transitions. [2021-07-09 18:25:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:19,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:19,411 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:19,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:19,627 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1376080687, now seen corresponding path program 45 times [2021-07-09 18:25:19,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:19,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489496492] [2021-07-09 18:25:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:19,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:19,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489496492] [2021-07-09 18:25:19,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489496492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:19,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600081019] [2021-07-09 18:25:19,968 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:20,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:25:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:25:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:20,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:20,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:25:20,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:20,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:20,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:82 [2021-07-09 18:25:20,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:25:20,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:20,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:25:20,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:20,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:20,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-07-09 18:25:20,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:20,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:25:20,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:20,561 INFO L628 ElimStorePlain]: treesize reduction 58, result has 71.3 percent of original size [2021-07-09 18:25:20,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:25:20,572 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:247, output treesize:206 [2021-07-09 18:25:20,791 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:25:20,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,837 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:20,838 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:20,934 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-07-09 18:25:20,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:20,942 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:20,943 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:21,033 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.2 percent of original size [2021-07-09 18:25:21,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,040 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:21,042 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:21,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:25:21,093 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:154 [2021-07-09 18:25:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600081019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:21,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:25:21,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940712827] [2021-07-09 18:25:21,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:25:21,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:21,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:25:21,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:21,298 INFO L87 Difference]: Start difference. First operand 38148 states and 158010 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:24,558 INFO L93 Difference]: Finished difference Result 69869 states and 283258 transitions. [2021-07-09 18:25:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:25:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:24,853 INFO L225 Difference]: With dead ends: 69869 [2021-07-09 18:25:24,853 INFO L226 Difference]: Without dead ends: 69705 [2021-07-09 18:25:24,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2595.2ms TimeCoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:25:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69705 states. [2021-07-09 18:25:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69705 to 38170. [2021-07-09 18:25:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38170 states, 38169 states have (on average 4.1419476538552225) internal successors, (158094), 38169 states have internal predecessors, (158094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38170 states to 38170 states and 158094 transitions. [2021-07-09 18:25:26,285 INFO L78 Accepts]: Start accepts. Automaton has 38170 states and 158094 transitions. Word has length 39 [2021-07-09 18:25:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:26,285 INFO L482 AbstractCegarLoop]: Abstraction has 38170 states and 158094 transitions. [2021-07-09 18:25:26,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 38170 states and 158094 transitions. [2021-07-09 18:25:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:26,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:26,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:26,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-09 18:25:26,808 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash 898253829, now seen corresponding path program 46 times [2021-07-09 18:25:26,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:26,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523088850] [2021-07-09 18:25:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:27,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:27,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523088850] [2021-07-09 18:25:27,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523088850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:27,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676162548] [2021-07-09 18:25:27,107 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:27,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:27,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:25:27,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:27,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:27,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:27,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:25:27,407 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:27,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:25:27,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:27,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:27,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:27,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:25:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676162548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:27,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:27,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:27,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125944427] [2021-07-09 18:25:27,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:27,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:27,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:27,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:27,452 INFO L87 Difference]: Start difference. First operand 38170 states and 158094 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:29,539 INFO L93 Difference]: Finished difference Result 84103 states and 342659 transitions. [2021-07-09 18:25:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:25:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:29,889 INFO L225 Difference]: With dead ends: 84103 [2021-07-09 18:25:29,889 INFO L226 Difference]: Without dead ends: 84021 [2021-07-09 18:25:29,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1076.5ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:25:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84021 states. [2021-07-09 18:25:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84021 to 37868. [2021-07-09 18:25:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37868 states, 37867 states have (on average 4.143607890775609) internal successors, (156906), 37867 states have internal predecessors, (156906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37868 states to 37868 states and 156906 transitions. [2021-07-09 18:25:31,438 INFO L78 Accepts]: Start accepts. Automaton has 37868 states and 156906 transitions. Word has length 39 [2021-07-09 18:25:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:31,438 INFO L482 AbstractCegarLoop]: Abstraction has 37868 states and 156906 transitions. [2021-07-09 18:25:31,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 37868 states and 156906 transitions. [2021-07-09 18:25:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:31,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:31,728 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:31,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:31,941 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash 575171183, now seen corresponding path program 47 times [2021-07-09 18:25:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:31,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729576697] [2021-07-09 18:25:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:32,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:32,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729576697] [2021-07-09 18:25:32,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729576697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:32,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192446080] [2021-07-09 18:25:32,279 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:32,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:25:32,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:32,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:25:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:32,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-07-09 18:25:32,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:32,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-09 18:25:32,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-09 18:25:32,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:32,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:32,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-09 18:25:32,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,727 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:25:32,728 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:32,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:32,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:32,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-09 18:25:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:32,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192446080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:32,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:32,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:25:32,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977071513] [2021-07-09 18:25:32,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:32,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:32,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:32,790 INFO L87 Difference]: Start difference. First operand 37868 states and 156906 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:36,851 INFO L93 Difference]: Finished difference Result 72342 states and 294304 transitions. [2021-07-09 18:25:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:25:36,851 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:37,291 INFO L225 Difference]: With dead ends: 72342 [2021-07-09 18:25:37,291 INFO L226 Difference]: Without dead ends: 72001 [2021-07-09 18:25:37,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2292.4ms TimeCoverageRelationStatistics Valid=672, Invalid=4020, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:25:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72001 states. [2021-07-09 18:25:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72001 to 38419. [2021-07-09 18:25:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38419 states, 38418 states have (on average 4.137045135092925) internal successors, (158937), 38418 states have internal predecessors, (158937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38419 states to 38419 states and 158937 transitions. [2021-07-09 18:25:38,761 INFO L78 Accepts]: Start accepts. Automaton has 38419 states and 158937 transitions. Word has length 39 [2021-07-09 18:25:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:38,761 INFO L482 AbstractCegarLoop]: Abstraction has 38419 states and 158937 transitions. [2021-07-09 18:25:38,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38419 states and 158937 transitions. [2021-07-09 18:25:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:38,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:38,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:39,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 18:25:39,069 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:39,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1727088047, now seen corresponding path program 48 times [2021-07-09 18:25:39,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:39,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340725716] [2021-07-09 18:25:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:39,584 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-09 18:25:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:39,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:39,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340725716] [2021-07-09 18:25:39,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340725716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:39,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769543367] [2021-07-09 18:25:39,691 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:39,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:25:39,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:25:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:39,990 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:39,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:25:39,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:39,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:39,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:39,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-07-09 18:25:40,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-09 18:25:40,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:40,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:40,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:40,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-09 18:25:40,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:25:40,091 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:40,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:40,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:40,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-09 18:25:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:40,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769543367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:40,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:40,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:25:40,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849521037] [2021-07-09 18:25:40,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:40,147 INFO L87 Difference]: Start difference. First operand 38419 states and 158937 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:43,331 INFO L93 Difference]: Finished difference Result 91087 states and 370453 transitions. [2021-07-09 18:25:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:25:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:43,946 INFO L225 Difference]: With dead ends: 91087 [2021-07-09 18:25:43,946 INFO L226 Difference]: Without dead ends: 90900 [2021-07-09 18:25:43,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1992.4ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:25:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90900 states. [2021-07-09 18:25:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90900 to 38186. [2021-07-09 18:25:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38186 states, 38185 states have (on average 4.1405787612937015) internal successors, (158108), 38185 states have internal predecessors, (158108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38186 states to 38186 states and 158108 transitions. [2021-07-09 18:25:45,697 INFO L78 Accepts]: Start accepts. Automaton has 38186 states and 158108 transitions. Word has length 39 [2021-07-09 18:25:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:45,698 INFO L482 AbstractCegarLoop]: Abstraction has 38186 states and 158108 transitions. [2021-07-09 18:25:45,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 38186 states and 158108 transitions. [2021-07-09 18:25:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:45,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:45,795 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:45,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:45,995 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 251470469, now seen corresponding path program 49 times [2021-07-09 18:25:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:45,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350592126] [2021-07-09 18:25:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:46,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:46,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350592126] [2021-07-09 18:25:46,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350592126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:46,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151355794] [2021-07-09 18:25:46,320 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:46,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:46,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:25:46,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:46,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:46,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:46,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:25:46,815 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:46,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:25:46,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:46,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:46,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:46,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:25:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:46,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151355794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:46,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:46,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155359120] [2021-07-09 18:25:46,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:46,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:46,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:46,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:46,858 INFO L87 Difference]: Start difference. First operand 38186 states and 158108 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:48,951 INFO L93 Difference]: Finished difference Result 84472 states and 343708 transitions. [2021-07-09 18:25:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:25:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:49,350 INFO L225 Difference]: With dead ends: 84472 [2021-07-09 18:25:49,350 INFO L226 Difference]: Without dead ends: 84320 [2021-07-09 18:25:49,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1200.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:25:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84320 states. [2021-07-09 18:25:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84320 to 38354. [2021-07-09 18:25:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 4.140797330065444) internal successors, (158812), 38353 states have internal predecessors, (158812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 158812 transitions. [2021-07-09 18:25:50,963 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 158812 transitions. Word has length 39 [2021-07-09 18:25:50,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:50,963 INFO L482 AbstractCegarLoop]: Abstraction has 38354 states and 158812 transitions. [2021-07-09 18:25:50,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 158812 transitions. [2021-07-09 18:25:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:51,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:51,051 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:51,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-09 18:25:51,252 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash 455391215, now seen corresponding path program 50 times [2021-07-09 18:25:51,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:51,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235074238] [2021-07-09 18:25:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:51,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235074238] [2021-07-09 18:25:51,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235074238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843419555] [2021-07-09 18:25:51,593 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:51,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:51,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:51,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:52,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:25:52,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:52,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:52,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:52,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:25:52,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:52,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:25:52,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:52,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:52,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:52,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:25:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:52,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843419555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:52,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:52,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:52,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694969421] [2021-07-09 18:25:52,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:52,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:52,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:52,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:52,158 INFO L87 Difference]: Start difference. First operand 38354 states and 158812 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:53,207 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-09 18:25:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:53,750 INFO L93 Difference]: Finished difference Result 72197 states and 294895 transitions. [2021-07-09 18:25:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:25:53,751 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:54,194 INFO L225 Difference]: With dead ends: 72197 [2021-07-09 18:25:54,194 INFO L226 Difference]: Without dead ends: 72091 [2021-07-09 18:25:54,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1067.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:25:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72091 states. [2021-07-09 18:25:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72091 to 38120. [2021-07-09 18:25:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38120 states, 38119 states have (on average 4.141661638552953) internal successors, (157876), 38119 states have internal predecessors, (157876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38120 states to 38120 states and 157876 transitions. [2021-07-09 18:25:55,610 INFO L78 Accepts]: Start accepts. Automaton has 38120 states and 157876 transitions. Word has length 39 [2021-07-09 18:25:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:55,610 INFO L482 AbstractCegarLoop]: Abstraction has 38120 states and 157876 transitions. [2021-07-09 18:25:55,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 38120 states and 157876 transitions. [2021-07-09 18:25:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:55,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:55,730 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:55,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 18:25:55,945 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash -175003259, now seen corresponding path program 51 times [2021-07-09 18:25:55,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:55,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657627708] [2021-07-09 18:25:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:56,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657627708] [2021-07-09 18:25:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657627708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225143269] [2021-07-09 18:25:56,246 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:56,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:25:56,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:56,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 18:25:56,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:56,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:56,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:56,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:35 [2021-07-09 18:25:56,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:56,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:25:56,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:56,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:56,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 18:25:56,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-07-09 18:25:56,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:56,650 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:56,652 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:56,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:56,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:56,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:25:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:56,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225143269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:56,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:56,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:25:56,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954838302] [2021-07-09 18:25:56,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:56,706 INFO L87 Difference]: Start difference. First operand 38120 states and 157876 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:00,441 INFO L93 Difference]: Finished difference Result 83885 states and 339235 transitions. [2021-07-09 18:26:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:26:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:00,784 INFO L225 Difference]: With dead ends: 83885 [2021-07-09 18:26:00,785 INFO L226 Difference]: Without dead ends: 83494 [2021-07-09 18:26:00,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2389.2ms TimeCoverageRelationStatistics Valid=827, Invalid=4723, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:26:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83494 states. [2021-07-09 18:26:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83494 to 38451. [2021-07-09 18:26:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.140988296488946) internal successors, (159221), 38450 states have internal predecessors, (159221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 159221 transitions. [2021-07-09 18:26:02,290 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 159221 transitions. Word has length 39 [2021-07-09 18:26:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:02,290 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 159221 transitions. [2021-07-09 18:26:02,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 159221 transitions. [2021-07-09 18:26:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:02,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:02,603 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:02,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:02,818 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:02,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:02,818 INFO L82 PathProgramCache]: Analyzing trace with hash -448909371, now seen corresponding path program 52 times [2021-07-09 18:26:02,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:02,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432906666] [2021-07-09 18:26:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:03,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:03,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432906666] [2021-07-09 18:26:03,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432906666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:03,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691530801] [2021-07-09 18:26:03,138 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:03,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:03,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:03,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:03,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:03,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:03,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:03,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:26:03,404 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:03,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:26:03,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:03,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:03,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:03,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:26:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:03,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691530801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:03,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:03,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:03,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91142646] [2021-07-09 18:26:03,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:03,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:03,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:03,452 INFO L87 Difference]: Start difference. First operand 38451 states and 159221 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:05,540 INFO L93 Difference]: Finished difference Result 91888 states and 374497 transitions. [2021-07-09 18:26:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:26:05,541 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:05,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:05,925 INFO L225 Difference]: With dead ends: 91888 [2021-07-09 18:26:05,926 INFO L226 Difference]: Without dead ends: 91806 [2021-07-09 18:26:05,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 981.9ms TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:26:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91806 states. [2021-07-09 18:26:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91806 to 38617. [2021-07-09 18:26:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38617 states, 38616 states have (on average 4.140692977004351) internal successors, (159897), 38616 states have internal predecessors, (159897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38617 states to 38617 states and 159897 transitions. [2021-07-09 18:26:07,792 INFO L78 Accepts]: Start accepts. Automaton has 38617 states and 159897 transitions. Word has length 39 [2021-07-09 18:26:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:07,793 INFO L482 AbstractCegarLoop]: Abstraction has 38617 states and 159897 transitions. [2021-07-09 18:26:07,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 38617 states and 159897 transitions. [2021-07-09 18:26:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:07,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:07,922 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:08,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-09 18:26:08,122 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:08,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1568844437, now seen corresponding path program 53 times [2021-07-09 18:26:08,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:08,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687357677] [2021-07-09 18:26:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:08,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:08,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687357677] [2021-07-09 18:26:08,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687357677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:08,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989080909] [2021-07-09 18:26:08,432 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:08,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:26:08,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:08,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:26:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:08,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:26:08,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:100 [2021-07-09 18:26:08,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-07-09 18:26:08,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-07-09 18:26:08,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:26:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:08,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:08,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-07-09 18:26:08,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:26:08,967 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:168, output treesize:90 [2021-07-09 18:26:09,051 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_10], 6=[q2]} [2021-07-09 18:26:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:09,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:09,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-07-09 18:26:09,066 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:09,252 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-07-09 18:26:09,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:09,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:09,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:09,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:26:09,270 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:09,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:09,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:26:09,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:110, output treesize:77 [2021-07-09 18:26:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:09,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989080909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:09,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:09,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:09,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73848067] [2021-07-09 18:26:09,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:09,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:09,414 INFO L87 Difference]: Start difference. First operand 38617 states and 159897 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:12,528 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-09 18:26:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:18,121 INFO L93 Difference]: Finished difference Result 103801 states and 418808 transitions. [2021-07-09 18:26:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:26:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:18,581 INFO L225 Difference]: With dead ends: 103801 [2021-07-09 18:26:18,581 INFO L226 Difference]: Without dead ends: 103476 [2021-07-09 18:26:18,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 6542.0ms TimeCoverageRelationStatistics Valid=2280, Invalid=12482, Unknown=0, NotChecked=0, Total=14762 [2021-07-09 18:26:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103476 states. [2021-07-09 18:26:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103476 to 38764. [2021-07-09 18:26:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.139566081056678) internal successors, (160462), 38763 states have internal predecessors, (160462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160462 transitions. [2021-07-09 18:26:20,379 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160462 transitions. Word has length 39 [2021-07-09 18:26:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:20,379 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160462 transitions. [2021-07-09 18:26:20,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160462 transitions. [2021-07-09 18:26:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:20,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:20,717 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:20,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-09 18:26:20,934 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:20,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:20,934 INFO L82 PathProgramCache]: Analyzing trace with hash -259731149, now seen corresponding path program 54 times [2021-07-09 18:26:20,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:20,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370990199] [2021-07-09 18:26:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:21,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:21,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370990199] [2021-07-09 18:26:21,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370990199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:21,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791116462] [2021-07-09 18:26:21,254 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:21,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:26:21,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:26:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:21,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:21,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:26:21,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:21,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:21,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:26:21,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:69 [2021-07-09 18:26:21,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:21,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:21,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:26:21,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:21,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:21,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:21,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:26:21,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:21,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:21,784 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-09 18:26:21,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 18:26:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:21,794 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:26:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:26:21,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:21,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:21,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:26:21,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:246, output treesize:116 [2021-07-09 18:26:22,136 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-07-09 18:26:22,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:22,183 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:26:22,184 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:22,259 INFO L628 ElimStorePlain]: treesize reduction 21, result has 83.2 percent of original size [2021-07-09 18:26:22,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:22,267 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:26:22,268 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:22,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:22,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:26:22,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:112 [2021-07-09 18:26:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:22,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791116462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:22,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:22,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:26:22,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181018599] [2021-07-09 18:26:22,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:26:22,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:22,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:26:22,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:26:22,517 INFO L87 Difference]: Start difference. First operand 38764 states and 160462 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:22,833 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-09 18:26:23,694 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 18:26:26,092 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 18:26:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:27,241 INFO L93 Difference]: Finished difference Result 74351 states and 301109 transitions. [2021-07-09 18:26:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:26:27,241 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:27,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:27,701 INFO L225 Difference]: With dead ends: 74351 [2021-07-09 18:26:27,701 INFO L226 Difference]: Without dead ends: 74179 [2021-07-09 18:26:27,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 3928.9ms TimeCoverageRelationStatistics Valid=1204, Invalid=4958, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:26:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74179 states. [2021-07-09 18:26:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74179 to 38810. [2021-07-09 18:26:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38810 states, 38809 states have (on average 4.139194516735809) internal successors, (160638), 38809 states have internal predecessors, (160638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38810 states to 38810 states and 160638 transitions. [2021-07-09 18:26:29,134 INFO L78 Accepts]: Start accepts. Automaton has 38810 states and 160638 transitions. Word has length 39 [2021-07-09 18:26:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:29,135 INFO L482 AbstractCegarLoop]: Abstraction has 38810 states and 160638 transitions. [2021-07-09 18:26:29,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 38810 states and 160638 transitions. [2021-07-09 18:26:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:29,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:29,236 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:29,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:29,437 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash -737558007, now seen corresponding path program 55 times [2021-07-09 18:26:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:29,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596940959] [2021-07-09 18:26:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:29,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:29,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596940959] [2021-07-09 18:26:29,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596940959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:29,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117230840] [2021-07-09 18:26:29,745 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:29,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:29,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:29,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:29,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:29,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:26:29,988 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:29,989 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:26:29,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:29,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:29,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:29,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:26:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:30,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117230840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:30,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:30,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:30,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867913412] [2021-07-09 18:26:30,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:30,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:30,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:30,047 INFO L87 Difference]: Start difference. First operand 38810 states and 160638 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:30,545 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-09 18:26:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:31,858 INFO L93 Difference]: Finished difference Result 90479 states and 368460 transitions. [2021-07-09 18:26:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:26:31,859 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:32,225 INFO L225 Difference]: With dead ends: 90479 [2021-07-09 18:26:32,226 INFO L226 Difference]: Without dead ends: 90397 [2021-07-09 18:26:32,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1106.1ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:26:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90397 states. [2021-07-09 18:26:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90397 to 38948. [2021-07-09 18:26:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38948 states, 38947 states have (on average 4.1378796826456465) internal successors, (161158), 38947 states have internal predecessors, (161158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38948 states to 38948 states and 161158 transitions. [2021-07-09 18:26:34,060 INFO L78 Accepts]: Start accepts. Automaton has 38948 states and 161158 transitions. Word has length 39 [2021-07-09 18:26:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:34,060 INFO L482 AbstractCegarLoop]: Abstraction has 38948 states and 161158 transitions. [2021-07-09 18:26:34,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 38948 states and 161158 transitions. [2021-07-09 18:26:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:34,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:34,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:34,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:34,389 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:34,390 INFO L82 PathProgramCache]: Analyzing trace with hash -707566413, now seen corresponding path program 56 times [2021-07-09 18:26:34,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:34,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803164806] [2021-07-09 18:26:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:34,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:34,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803164806] [2021-07-09 18:26:34,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803164806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:34,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145073209] [2021-07-09 18:26:34,691 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:34,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:34,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:34,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:34,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:34,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:34,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:26:34,947 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:34,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:26:34,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:34,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:34,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:34,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:26:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:35,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145073209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:35,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:35,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:35,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349291800] [2021-07-09 18:26:35,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:35,001 INFO L87 Difference]: Start difference. First operand 38948 states and 161158 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:37,836 INFO L93 Difference]: Finished difference Result 111695 states and 453391 transitions. [2021-07-09 18:26:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:26:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:38,641 INFO L225 Difference]: With dead ends: 111695 [2021-07-09 18:26:38,642 INFO L226 Difference]: Without dead ends: 111575 [2021-07-09 18:26:38,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1480.5ms TimeCoverageRelationStatistics Valid=462, Invalid=2294, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:26:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111575 states. [2021-07-09 18:26:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111575 to 38320. [2021-07-09 18:26:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38320 states, 38319 states have (on average 4.140922257887732) internal successors, (158676), 38319 states have internal predecessors, (158676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38320 states to 38320 states and 158676 transitions. [2021-07-09 18:26:40,606 INFO L78 Accepts]: Start accepts. Automaton has 38320 states and 158676 transitions. Word has length 39 [2021-07-09 18:26:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:40,606 INFO L482 AbstractCegarLoop]: Abstraction has 38320 states and 158676 transitions. [2021-07-09 18:26:40,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 38320 states and 158676 transitions. [2021-07-09 18:26:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:40,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:40,700 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:40,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:40,900 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1646067281, now seen corresponding path program 57 times [2021-07-09 18:26:40,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:40,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377310888] [2021-07-09 18:26:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:41,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:41,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377310888] [2021-07-09 18:26:41,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377310888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:41,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975847491] [2021-07-09 18:26:41,480 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:41,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:26:41,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:41,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:26:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:41,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:41,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:41,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:26:41,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:41,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:41,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:41,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-09 18:26:41,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:41,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-09 18:26:41,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:41,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:41,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:26:41,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-09 18:26:41,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:41,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:26:41,995 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:42,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:42,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:42,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-09 18:26:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:42,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975847491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:42,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:42,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:26:42,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37840601] [2021-07-09 18:26:42,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:26:42,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:42,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:26:42,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:26:42,163 INFO L87 Difference]: Start difference. First operand 38320 states and 158676 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,762 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-07-09 18:26:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:46,834 INFO L93 Difference]: Finished difference Result 66215 states and 267753 transitions. [2021-07-09 18:26:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:26:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:47,081 INFO L225 Difference]: With dead ends: 66215 [2021-07-09 18:26:47,082 INFO L226 Difference]: Without dead ends: 66067 [2021-07-09 18:26:47,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 4031.7ms TimeCoverageRelationStatistics Valid=977, Invalid=6855, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:26:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66067 states. [2021-07-09 18:26:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66067 to 38912. [2021-07-09 18:26:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38912 states, 38911 states have (on average 4.136722263627252) internal successors, (160964), 38911 states have internal predecessors, (160964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38912 states to 38912 states and 160964 transitions. [2021-07-09 18:26:48,412 INFO L78 Accepts]: Start accepts. Automaton has 38912 states and 160964 transitions. Word has length 39 [2021-07-09 18:26:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:48,412 INFO L482 AbstractCegarLoop]: Abstraction has 38912 states and 160964 transitions. [2021-07-09 18:26:48,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 38912 states and 160964 transitions. [2021-07-09 18:26:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:48,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:48,507 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:48,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-07-09 18:26:48,709 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash 967063105, now seen corresponding path program 58 times [2021-07-09 18:26:48,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:48,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392213120] [2021-07-09 18:26:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:49,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392213120] [2021-07-09 18:26:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392213120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008691049] [2021-07-09 18:26:49,010 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:49,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:49,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:49,403 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:26:49,435 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:49,435 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:26:49,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:49,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:49,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:49,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:26:49,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:26:49,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:49,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:49,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:49,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:26:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:49,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008691049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:49,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:49,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:49,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542740144] [2021-07-09 18:26:49,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:49,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:49,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:49,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:49,554 INFO L87 Difference]: Start difference. First operand 38912 states and 160964 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:51,854 INFO L93 Difference]: Finished difference Result 85324 states and 346778 transitions. [2021-07-09 18:26:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:26:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:52,221 INFO L225 Difference]: With dead ends: 85324 [2021-07-09 18:26:52,221 INFO L226 Difference]: Without dead ends: 85108 [2021-07-09 18:26:52,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1231.0ms TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:26:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85108 states. [2021-07-09 18:26:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85108 to 38662. [2021-07-09 18:26:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38662 states, 38661 states have (on average 4.14127932541838) internal successors, (160106), 38661 states have internal predecessors, (160106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38662 states to 38662 states and 160106 transitions. [2021-07-09 18:26:53,820 INFO L78 Accepts]: Start accepts. Automaton has 38662 states and 160106 transitions. Word has length 39 [2021-07-09 18:26:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:53,820 INFO L482 AbstractCegarLoop]: Abstraction has 38662 states and 160106 transitions. [2021-07-09 18:26:53,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 38662 states and 160106 transitions. [2021-07-09 18:26:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:53,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:53,908 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:54,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:54,109 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash 165788335, now seen corresponding path program 59 times [2021-07-09 18:26:54,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:54,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483618953] [2021-07-09 18:26:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:54,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:54,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483618953] [2021-07-09 18:26:54,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483618953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:54,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963321044] [2021-07-09 18:26:54,343 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:54,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:26:54,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:26:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-09 18:26:54,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:26:54,751 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.3 percent of original size [2021-07-09 18:26:54,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:40 [2021-07-09 18:26:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:26:54,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-09 18:26:54,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:54,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:26:54,869 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:54,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:54,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-09 18:26:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:54,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963321044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:54,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:54,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:26:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840445955] [2021-07-09 18:26:54,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:26:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:26:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:54,917 INFO L87 Difference]: Start difference. First operand 38662 states and 160106 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:57,814 INFO L93 Difference]: Finished difference Result 64664 states and 263109 transitions. [2021-07-09 18:26:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:26:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:58,068 INFO L225 Difference]: With dead ends: 64664 [2021-07-09 18:26:58,068 INFO L226 Difference]: Without dead ends: 64554 [2021-07-09 18:26:58,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1830.4ms TimeCoverageRelationStatistics Valid=687, Invalid=4005, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:26:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64554 states. [2021-07-09 18:26:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64554 to 38976. [2021-07-09 18:26:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38976 states, 38975 states have (on average 4.139345734445157) internal successors, (161331), 38975 states have internal predecessors, (161331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38976 states to 38976 states and 161331 transitions. [2021-07-09 18:26:59,373 INFO L78 Accepts]: Start accepts. Automaton has 38976 states and 161331 transitions. Word has length 39 [2021-07-09 18:26:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:59,373 INFO L482 AbstractCegarLoop]: Abstraction has 38976 states and 161331 transitions. [2021-07-09 18:26:59,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38976 states and 161331 transitions. [2021-07-09 18:26:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:59,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:59,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:59,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:59,665 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash -560742591, now seen corresponding path program 60 times [2021-07-09 18:26:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740469636] [2021-07-09 18:26:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:59,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:59,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740469636] [2021-07-09 18:26:59,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740469636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:59,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206167036] [2021-07-09 18:26:59,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:00,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:27:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:27:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:00,305 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:00,306 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:00,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:00,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-09 18:27:00,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:27:00,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:00,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:00,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:27:00,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:00,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:00,381 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:00,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:00,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:00,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:27:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:00,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206167036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:00,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:00,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:27:00,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094406570] [2021-07-09 18:27:00,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:27:00,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:00,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:27:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:27:00,424 INFO L87 Difference]: Start difference. First operand 38976 states and 161331 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:02,999 INFO L93 Difference]: Finished difference Result 88281 states and 358606 transitions. [2021-07-09 18:27:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:27:02,999 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:03,364 INFO L225 Difference]: With dead ends: 88281 [2021-07-09 18:27:03,365 INFO L226 Difference]: Without dead ends: 88226 [2021-07-09 18:27:03,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1420.2ms TimeCoverageRelationStatistics Valid=526, Invalid=3014, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:27:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88226 states. [2021-07-09 18:27:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88226 to 38600. [2021-07-09 18:27:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38600 states, 38599 states have (on average 4.1400554418508255) internal successors, (159802), 38599 states have internal predecessors, (159802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38600 states to 38600 states and 159802 transitions. [2021-07-09 18:27:05,153 INFO L78 Accepts]: Start accepts. Automaton has 38600 states and 159802 transitions. Word has length 39 [2021-07-09 18:27:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:05,153 INFO L482 AbstractCegarLoop]: Abstraction has 38600 states and 159802 transitions. [2021-07-09 18:27:05,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 38600 states and 159802 transitions. [2021-07-09 18:27:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:05,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:05,253 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:05,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:05,456 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash 807300523, now seen corresponding path program 61 times [2021-07-09 18:27:05,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:05,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869787141] [2021-07-09 18:27:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:05,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:05,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869787141] [2021-07-09 18:27:05,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869787141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:05,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623650552] [2021-07-09 18:27:05,789 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:05,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:06,030 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:06,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:27:06,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:06,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:06,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:06,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:27:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:27:06,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:06,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:06,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:06,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:27:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:06,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623650552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:06,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:06,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:06,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943014521] [2021-07-09 18:27:06,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:06,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:06,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:06,109 INFO L87 Difference]: Start difference. First operand 38600 states and 159802 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:06,591 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 18:27:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:08,120 INFO L93 Difference]: Finished difference Result 71434 states and 291667 transitions. [2021-07-09 18:27:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:27:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:08,401 INFO L225 Difference]: With dead ends: 71434 [2021-07-09 18:27:08,401 INFO L226 Difference]: Without dead ends: 71186 [2021-07-09 18:27:08,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1221.8ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:27:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71186 states. [2021-07-09 18:27:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71186 to 38786. [2021-07-09 18:27:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.138249323191956) internal successors, (160502), 38785 states have internal predecessors, (160502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160502 transitions. [2021-07-09 18:27:09,781 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160502 transitions. Word has length 39 [2021-07-09 18:27:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:09,782 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160502 transitions. [2021-07-09 18:27:09,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160502 transitions. [2021-07-09 18:27:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:09,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:09,869 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:10,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-09 18:27:10,070 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:10,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1900909765, now seen corresponding path program 62 times [2021-07-09 18:27:10,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:10,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719970371] [2021-07-09 18:27:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:10,492 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-09 18:27:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:10,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:10,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719970371] [2021-07-09 18:27:10,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719970371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:10,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165101574] [2021-07-09 18:27:10,596 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:10,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:10,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:10,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:10,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:27:10,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:10,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:10,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:10,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:27:10,872 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:10,872 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:27:10,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:10,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:10,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:10,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:27:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:10,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165101574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:10,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:10,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:10,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770855487] [2021-07-09 18:27:10,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:10,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:10,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:10,915 INFO L87 Difference]: Start difference. First operand 38786 states and 160502 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:13,008 INFO L93 Difference]: Finished difference Result 88085 states and 358572 transitions. [2021-07-09 18:27:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:27:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:13,364 INFO L225 Difference]: With dead ends: 88085 [2021-07-09 18:27:13,365 INFO L226 Difference]: Without dead ends: 87917 [2021-07-09 18:27:13,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=415, Invalid=2035, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:27:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87917 states. [2021-07-09 18:27:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87917 to 38764. [2021-07-09 18:27:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.1404174083533265) internal successors, (160495), 38763 states have internal predecessors, (160495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160495 transitions. [2021-07-09 18:27:14,929 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160495 transitions. Word has length 39 [2021-07-09 18:27:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:14,929 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160495 transitions. [2021-07-09 18:27:14,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160495 transitions. [2021-07-09 18:27:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:15,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:15,019 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:15,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:15,219 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash 374060779, now seen corresponding path program 63 times [2021-07-09 18:27:15,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:15,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521693333] [2021-07-09 18:27:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:15,544 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-09 18:27:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:15,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521693333] [2021-07-09 18:27:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521693333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:15,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649956806] [2021-07-09 18:27:15,745 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:15,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:27:15,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:15,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:27:15,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:16,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-07-09 18:27:16,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:27:16,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:146 [2021-07-09 18:27:16,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-07-09 18:27:16,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,368 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:27:16,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:27:16,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,393 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:27:16,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:27:16,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:27:16,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:16,414 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:16,414 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:27:16,415 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,428 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:27:16,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 1 [2021-07-09 18:27:16,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,457 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:27:16,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2021-07-09 18:27:16,459 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:16,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:16,469 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:16,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 30 [2021-07-09 18:27:16,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,499 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:27:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 53 [2021-07-09 18:27:16,501 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,513 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:27:16,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:27:16,514 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,525 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:27:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 1 [2021-07-09 18:27:16,526 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,534 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:16,534 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:27:16,535 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,820 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 18:27:16,821 INFO L628 ElimStorePlain]: treesize reduction 119, result has 71.3 percent of original size [2021-07-09 18:27:16,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 18:27:16,830 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:723, output treesize:201 [2021-07-09 18:27:16,976 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_13, v_prenex_12, v_prenex_15], 3=[v_prenex_14]} [2021-07-09 18:27:16,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,985 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:16,986 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:17,146 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-09 18:27:17,146 INFO L628 ElimStorePlain]: treesize reduction 19, result has 93.0 percent of original size [2021-07-09 18:27:17,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:17,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:17,156 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:17,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:17,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:27:17,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:17,376 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-09 18:27:17,377 INFO L628 ElimStorePlain]: treesize reduction 48, result has 80.0 percent of original size [2021-07-09 18:27:17,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:17,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:17,386 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:17,497 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-09 18:27:17,498 INFO L628 ElimStorePlain]: treesize reduction 26, result has 86.4 percent of original size [2021-07-09 18:27:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:17,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-07-09 18:27:17,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:17,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:27:17,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:17,600 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.2 percent of original size [2021-07-09 18:27:17,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:27:17,603 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:272, output treesize:111 [2021-07-09 18:27:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:17,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649956806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:17,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:17,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-09 18:27:17,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152599961] [2021-07-09 18:27:17,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:27:17,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:17,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:27:17,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:17,800 INFO L87 Difference]: Start difference. First operand 38764 states and 160495 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:19,966 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2021-07-09 18:27:20,373 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-09 18:27:20,944 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-07-09 18:27:21,174 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-09 18:27:21,408 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-07-09 18:27:21,629 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-07-09 18:27:22,144 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-07-09 18:27:22,419 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 18:27:23,230 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-09 18:27:23,816 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-09 18:27:24,303 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-07-09 18:27:24,612 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 86 [2021-07-09 18:27:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:25,433 INFO L93 Difference]: Finished difference Result 74404 states and 301069 transitions. [2021-07-09 18:27:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:27:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:25,711 INFO L225 Difference]: With dead ends: 74404 [2021-07-09 18:27:25,711 INFO L226 Difference]: Without dead ends: 74256 [2021-07-09 18:27:25,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 6516.9ms TimeCoverageRelationStatistics Valid=1652, Invalid=8248, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:27:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74256 states. [2021-07-09 18:27:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74256 to 38786. [2021-07-09 18:27:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.140234626788707) internal successors, (160579), 38785 states have internal predecessors, (160579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160579 transitions. [2021-07-09 18:27:26,944 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160579 transitions. Word has length 39 [2021-07-09 18:27:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:26,944 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160579 transitions. [2021-07-09 18:27:26,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160579 transitions. [2021-07-09 18:27:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:27,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:27,031 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:27,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:27,231 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:27,231 INFO L82 PathProgramCache]: Analyzing trace with hash -103766079, now seen corresponding path program 64 times [2021-07-09 18:27:27,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:27,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734281467] [2021-07-09 18:27:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:27,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:27,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734281467] [2021-07-09 18:27:27,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734281467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:27,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700330715] [2021-07-09 18:27:27,524 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:27,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:27,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:27,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:27:27,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:27:27,801 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:27,801 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:27:27,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:27,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:27,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:27:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:27,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700330715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:27,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:27,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:27,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2471795] [2021-07-09 18:27:27,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:27,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:27,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:27,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:27,844 INFO L87 Difference]: Start difference. First operand 38786 states and 160579 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:28,721 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-07-09 18:27:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:30,610 INFO L93 Difference]: Finished difference Result 87653 states and 356978 transitions. [2021-07-09 18:27:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:27:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:30,963 INFO L225 Difference]: With dead ends: 87653 [2021-07-09 18:27:30,964 INFO L226 Difference]: Without dead ends: 87571 [2021-07-09 18:27:30,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1508.4ms TimeCoverageRelationStatistics Valid=411, Invalid=2241, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:27:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87571 states. [2021-07-09 18:27:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87571 to 38508. [2021-07-09 18:27:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38508 states, 38507 states have (on average 4.141454800425897) internal successors, (159475), 38507 states have internal predecessors, (159475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38508 states to 38508 states and 159475 transitions. [2021-07-09 18:27:32,503 INFO L78 Accepts]: Start accepts. Automaton has 38508 states and 159475 transitions. Word has length 39 [2021-07-09 18:27:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:32,503 INFO L482 AbstractCegarLoop]: Abstraction has 38508 states and 159475 transitions. [2021-07-09 18:27:32,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38508 states and 159475 transitions. [2021-07-09 18:27:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:32,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:32,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:32,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-07-09 18:27:32,789 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:32,789 INFO L82 PathProgramCache]: Analyzing trace with hash -335385293, now seen corresponding path program 65 times [2021-07-09 18:27:32,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:32,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862915917] [2021-07-09 18:27:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:33,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862915917] [2021-07-09 18:27:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862915917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143187258] [2021-07-09 18:27:33,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:33,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:27:33,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:27:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:27:33,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,555 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-09 18:27:33,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:27:33,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:108 [2021-07-09 18:27:33,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,680 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2021-07-09 18:27:33,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:33,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-07-09 18:27:33,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,722 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:27:33,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2021-07-09 18:27:33,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,731 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:33,731 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-09 18:27:33,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,819 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.3 percent of original size [2021-07-09 18:27:33,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:27:33,830 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:173, output treesize:99 [2021-07-09 18:27:33,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:27:33,971 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:33,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:33,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-09 18:27:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143187258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:34,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:34,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752802372] [2021-07-09 18:27:34,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:34,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:34,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:34,040 INFO L87 Difference]: Start difference. First operand 38508 states and 159475 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:39,005 INFO L93 Difference]: Finished difference Result 76510 states and 312073 transitions. [2021-07-09 18:27:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:27:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:39,298 INFO L225 Difference]: With dead ends: 76510 [2021-07-09 18:27:39,298 INFO L226 Difference]: Without dead ends: 76400 [2021-07-09 18:27:39,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2949.0ms TimeCoverageRelationStatistics Valid=947, Invalid=6363, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:27:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76400 states. [2021-07-09 18:27:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76400 to 39033. [2021-07-09 18:27:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39033 states, 39032 states have (on average 4.140525722484115) internal successors, (161613), 39032 states have internal predecessors, (161613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39033 states to 39033 states and 161613 transitions. [2021-07-09 18:27:40,744 INFO L78 Accepts]: Start accepts. Automaton has 39033 states and 161613 transitions. Word has length 39 [2021-07-09 18:27:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:40,744 INFO L482 AbstractCegarLoop]: Abstraction has 39033 states and 161613 transitions. [2021-07-09 18:27:40,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39033 states and 161613 transitions. [2021-07-09 18:27:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:40,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:40,845 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:41,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-09 18:27:41,056 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1178071479, now seen corresponding path program 66 times [2021-07-09 18:27:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:41,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530779922] [2021-07-09 18:27:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:41,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530779922] [2021-07-09 18:27:41,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530779922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629502679] [2021-07-09 18:27:41,293 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:41,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:27:41,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:41,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:27:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:41,594 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:27:41,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:27:41,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:41,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:27:41,692 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:27:41,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:41,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:41,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:27:41,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:41,737 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:41,738 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:41,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:41,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:41,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:27:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:41,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629502679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:41,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:41,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:27:41,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518575235] [2021-07-09 18:27:41,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:27:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:41,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:27:41,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:27:41,787 INFO L87 Difference]: Start difference. First operand 39033 states and 161613 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:44,700 INFO L93 Difference]: Finished difference Result 98553 states and 401234 transitions. [2021-07-09 18:27:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:27:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:45,116 INFO L225 Difference]: With dead ends: 98553 [2021-07-09 18:27:45,117 INFO L226 Difference]: Without dead ends: 98498 [2021-07-09 18:27:45,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1611.8ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:27:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98498 states. [2021-07-09 18:27:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98498 to 38951. [2021-07-09 18:27:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38951 states, 38950 states have (on average 4.142028241335045) internal successors, (161332), 38950 states have internal predecessors, (161332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38951 states to 38951 states and 161332 transitions. [2021-07-09 18:27:46,910 INFO L78 Accepts]: Start accepts. Automaton has 38951 states and 161332 transitions. Word has length 39 [2021-07-09 18:27:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:46,910 INFO L482 AbstractCegarLoop]: Abstraction has 38951 states and 161332 transitions. [2021-07-09 18:27:46,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 38951 states and 161332 transitions. [2021-07-09 18:27:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:46,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:46,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:47,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:47,197 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1021356079, now seen corresponding path program 67 times [2021-07-09 18:27:47,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:47,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389268132] [2021-07-09 18:27:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:47,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:47,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389268132] [2021-07-09 18:27:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389268132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:47,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548256232] [2021-07-09 18:27:47,449 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:47,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:27:47,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:27:47,715 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:47,716 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:27:47,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:27:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:47,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548256232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:47,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:47,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:47,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406789317] [2021-07-09 18:27:47,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:47,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:47,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:47,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:47,757 INFO L87 Difference]: Start difference. First operand 38951 states and 161332 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:47,996 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-07-09 18:27:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:49,574 INFO L93 Difference]: Finished difference Result 80550 states and 330912 transitions. [2021-07-09 18:27:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:27:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:49,893 INFO L225 Difference]: With dead ends: 80550 [2021-07-09 18:27:49,893 INFO L226 Difference]: Without dead ends: 80495 [2021-07-09 18:27:49,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1014.4ms TimeCoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:27:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80495 states. [2021-07-09 18:27:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80495 to 39901. [2021-07-09 18:27:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39901 states, 39900 states have (on average 4.144611528822055) internal successors, (165370), 39900 states have internal predecessors, (165370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39901 states to 39901 states and 165370 transitions. [2021-07-09 18:27:51,585 INFO L78 Accepts]: Start accepts. Automaton has 39901 states and 165370 transitions. Word has length 39 [2021-07-09 18:27:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:51,585 INFO L482 AbstractCegarLoop]: Abstraction has 39901 states and 165370 transitions. [2021-07-09 18:27:51,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 39901 states and 165370 transitions. [2021-07-09 18:27:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:51,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:51,687 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:51,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:51,888 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:51,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1784259093, now seen corresponding path program 68 times [2021-07-09 18:27:51,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:51,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328636033] [2021-07-09 18:27:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:52,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:52,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328636033] [2021-07-09 18:27:52,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328636033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:52,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005215546] [2021-07-09 18:27:52,132 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:52,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:52,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:52,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:27:52,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:52,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:27:52,383 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:52,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:27:52,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:52,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:52,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:27:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:52,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005215546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:52,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:52,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:52,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631255045] [2021-07-09 18:27:52,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:52,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:52,424 INFO L87 Difference]: Start difference. First operand 39901 states and 165370 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:52,968 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-07-09 18:27:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:54,530 INFO L93 Difference]: Finished difference Result 77926 states and 319907 transitions. [2021-07-09 18:27:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:27:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:54,852 INFO L225 Difference]: With dead ends: 77926 [2021-07-09 18:27:54,852 INFO L226 Difference]: Without dead ends: 77871 [2021-07-09 18:27:54,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 993.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:27:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77871 states. [2021-07-09 18:27:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77871 to 39485. [2021-07-09 18:27:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39485 states, 39484 states have (on average 4.144666193901327) internal successors, (163648), 39484 states have internal predecessors, (163648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39485 states to 39485 states and 163648 transitions. [2021-07-09 18:27:56,262 INFO L78 Accepts]: Start accepts. Automaton has 39485 states and 163648 transitions. Word has length 39 [2021-07-09 18:27:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:56,262 INFO L482 AbstractCegarLoop]: Abstraction has 39485 states and 163648 transitions. [2021-07-09 18:27:56,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 39485 states and 163648 transitions. [2021-07-09 18:27:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:56,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:56,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:56,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:56,808 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:56,808 INFO L82 PathProgramCache]: Analyzing trace with hash -829473297, now seen corresponding path program 69 times [2021-07-09 18:27:56,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:56,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782785209] [2021-07-09 18:27:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:57,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:57,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782785209] [2021-07-09 18:27:57,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782785209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:57,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536398915] [2021-07-09 18:27:57,127 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:57,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:27:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:27:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:57,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:57,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-07-09 18:27:57,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:57,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:57,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:57,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:106 [2021-07-09 18:27:57,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:57,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:27:57,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:57,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:57,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:57,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-07-09 18:27:57,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:57,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:57,624 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:57,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:27:57,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:57,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:57,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:57,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-07-09 18:27:57,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:57,674 INFO L628 ElimStorePlain]: treesize reduction 46, result has 50.0 percent of original size [2021-07-09 18:27:57,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:57,676 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:47 [2021-07-09 18:27:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:57,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536398915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:57,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:57,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:27:57,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504829795] [2021-07-09 18:27:57,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:27:57,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:27:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:27:57,813 INFO L87 Difference]: Start difference. First operand 39485 states and 163648 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:02,850 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-07-09 18:28:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:03,190 INFO L93 Difference]: Finished difference Result 65504 states and 265768 transitions. [2021-07-09 18:28:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:28:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:03,450 INFO L225 Difference]: With dead ends: 65504 [2021-07-09 18:28:03,451 INFO L226 Difference]: Without dead ends: 65356 [2021-07-09 18:28:03,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 3886.8ms TimeCoverageRelationStatistics Valid=1000, Invalid=6832, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:28:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65356 states. [2021-07-09 18:28:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65356 to 39869. [2021-07-09 18:28:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39869 states, 39868 states have (on average 4.140614026286746) internal successors, (165078), 39868 states have internal predecessors, (165078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39869 states to 39869 states and 165078 transitions. [2021-07-09 18:28:04,803 INFO L78 Accepts]: Start accepts. Automaton has 39869 states and 165078 transitions. Word has length 39 [2021-07-09 18:28:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:04,803 INFO L482 AbstractCegarLoop]: Abstraction has 39869 states and 165078 transitions. [2021-07-09 18:28:04,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39869 states and 165078 transitions. [2021-07-09 18:28:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:04,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:04,891 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:05,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-07-09 18:28:05,092 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash 920414259, now seen corresponding path program 70 times [2021-07-09 18:28:05,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:05,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109226184] [2021-07-09 18:28:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:05,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:05,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109226184] [2021-07-09 18:28:05,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109226184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:05,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686519562] [2021-07-09 18:28:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:05,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:05,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:05,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:05,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:05,667 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:28:05,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:05,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:05,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:05,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:28:05,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:28:05,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:05,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:05,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:05,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:28:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:05,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686519562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:05,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:05,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:28:05,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262547529] [2021-07-09 18:28:05,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:05,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:05,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:05,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:28:05,743 INFO L87 Difference]: Start difference. First operand 39869 states and 165078 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:08,488 INFO L93 Difference]: Finished difference Result 86144 states and 349998 transitions. [2021-07-09 18:28:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:28:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:09,002 INFO L225 Difference]: With dead ends: 86144 [2021-07-09 18:28:09,002 INFO L226 Difference]: Without dead ends: 85920 [2021-07-09 18:28:09,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1376.5ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:28:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85920 states. [2021-07-09 18:28:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85920 to 39648. [2021-07-09 18:28:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39648 states, 39647 states have (on average 4.144626327338765) internal successors, (164322), 39647 states have internal predecessors, (164322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39648 states to 39648 states and 164322 transitions. [2021-07-09 18:28:10,547 INFO L78 Accepts]: Start accepts. Automaton has 39648 states and 164322 transitions. Word has length 39 [2021-07-09 18:28:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:10,547 INFO L482 AbstractCegarLoop]: Abstraction has 39648 states and 164322 transitions. [2021-07-09 18:28:10,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 39648 states and 164322 transitions. [2021-07-09 18:28:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:10,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:10,634 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:10,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-09 18:28:10,835 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:10,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1466633787, now seen corresponding path program 71 times [2021-07-09 18:28:10,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:10,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304665702] [2021-07-09 18:28:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:11,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:11,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304665702] [2021-07-09 18:28:11,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304665702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:11,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835513692] [2021-07-09 18:28:11,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:11,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:28:11,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:28:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:11,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:28:11,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:11,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:11,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-09 18:28:11,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-09 18:28:11,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:11,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-07-09 18:28:11,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:11,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:11,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:28:11,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:28 [2021-07-09 18:28:11,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:11,773 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:28:11,774 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:11,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:11,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:11,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-09 18:28:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:11,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835513692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:11,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:11,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:28:11,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190330194] [2021-07-09 18:28:11,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:28:11,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:28:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:28:11,829 INFO L87 Difference]: Start difference. First operand 39648 states and 164322 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:17,206 INFO L93 Difference]: Finished difference Result 112657 states and 457618 transitions. [2021-07-09 18:28:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:28:17,206 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:17,932 INFO L225 Difference]: With dead ends: 112657 [2021-07-09 18:28:17,932 INFO L226 Difference]: Without dead ends: 112250 [2021-07-09 18:28:17,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 3312.8ms TimeCoverageRelationStatistics Valid=1144, Invalid=7228, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:28:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112250 states. [2021-07-09 18:28:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112250 to 40068. [2021-07-09 18:28:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40068 states, 40067 states have (on average 4.142186837047944) internal successors, (165965), 40067 states have internal predecessors, (165965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40068 states to 40068 states and 165965 transitions. [2021-07-09 18:28:19,780 INFO L78 Accepts]: Start accepts. Automaton has 40068 states and 165965 transitions. Word has length 39 [2021-07-09 18:28:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:19,780 INFO L482 AbstractCegarLoop]: Abstraction has 40068 states and 165965 transitions. [2021-07-09 18:28:19,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 40068 states and 165965 transitions. [2021-07-09 18:28:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:19,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:19,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:20,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 18:28:20,069 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1262713041, now seen corresponding path program 72 times [2021-07-09 18:28:20,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:20,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354386757] [2021-07-09 18:28:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:20,414 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-09 18:28:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:20,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:20,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354386757] [2021-07-09 18:28:20,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354386757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:20,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273660006] [2021-07-09 18:28:20,646 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:20,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:28:20,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:20,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:20,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:20,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-09 18:28:20,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:39 [2021-07-09 18:28:20,922 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:20,922 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:28:20,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:11 [2021-07-09 18:28:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:20,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273660006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:20,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:20,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:28:20,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932446445] [2021-07-09 18:28:20,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:28:20,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:20,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:28:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:28:20,994 INFO L87 Difference]: Start difference. First operand 40068 states and 165965 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:22,883 INFO L93 Difference]: Finished difference Result 71486 states and 291440 transitions. [2021-07-09 18:28:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:28:22,884 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:23,196 INFO L225 Difference]: With dead ends: 71486 [2021-07-09 18:28:23,196 INFO L226 Difference]: Without dead ends: 71337 [2021-07-09 18:28:23,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1335.0ms TimeCoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:28:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71337 states. [2021-07-09 18:28:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71337 to 40290. [2021-07-09 18:28:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40290 states, 40289 states have (on average 4.141949415473206) internal successors, (166875), 40289 states have internal predecessors, (166875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40290 states to 40290 states and 166875 transitions. [2021-07-09 18:28:24,660 INFO L78 Accepts]: Start accepts. Automaton has 40290 states and 166875 transitions. Word has length 39 [2021-07-09 18:28:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:24,660 INFO L482 AbstractCegarLoop]: Abstraction has 40290 states and 166875 transitions. [2021-07-09 18:28:24,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 40290 states and 166875 transitions. [2021-07-09 18:28:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:24,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:24,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:24,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:24,960 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -991443623, now seen corresponding path program 73 times [2021-07-09 18:28:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:24,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120601760] [2021-07-09 18:28:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:25,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:25,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120601760] [2021-07-09 18:28:25,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120601760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:25,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278373481] [2021-07-09 18:28:25,268 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:25,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:25,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:28:25,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:25,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:28:25,692 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:25,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:28:25,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:25,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:28:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:25,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278373481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:25,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:25,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-07-09 18:28:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415324068] [2021-07-09 18:28:25,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:28:25,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:28:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:28:25,730 INFO L87 Difference]: Start difference. First operand 40290 states and 166875 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:27,809 INFO L93 Difference]: Finished difference Result 74908 states and 306273 transitions. [2021-07-09 18:28:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:28:27,809 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:28,247 INFO L225 Difference]: With dead ends: 74908 [2021-07-09 18:28:28,247 INFO L226 Difference]: Without dead ends: 74834 [2021-07-09 18:28:28,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1213.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:28:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74834 states. [2021-07-09 18:28:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74834 to 40210. [2021-07-09 18:28:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40210 states, 40209 states have (on average 4.1430774204780025) internal successors, (166589), 40209 states have internal predecessors, (166589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40210 states to 40210 states and 166589 transitions. [2021-07-09 18:28:29,741 INFO L78 Accepts]: Start accepts. Automaton has 40210 states and 166589 transitions. Word has length 39 [2021-07-09 18:28:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:29,741 INFO L482 AbstractCegarLoop]: Abstraction has 40210 states and 166589 transitions. [2021-07-09 18:28:29,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40210 states and 166589 transitions. [2021-07-09 18:28:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:29,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:29,833 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:30,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-09 18:28:30,033 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1434492331, now seen corresponding path program 74 times [2021-07-09 18:28:30,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:30,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060368802] [2021-07-09 18:28:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:30,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:30,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060368802] [2021-07-09 18:28:30,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060368802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:30,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703890606] [2021-07-09 18:28:30,339 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:30,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:30,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:30,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:28:30,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:30,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:30,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:30,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:28:30,598 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:30,598 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:28:30,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:30,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:30,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:30,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:28:30,807 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 18:28:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:30,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703890606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:30,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:30,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:28:30,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687125799] [2021-07-09 18:28:30,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:28:30,842 INFO L87 Difference]: Start difference. First operand 40210 states and 166589 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:33,620 INFO L93 Difference]: Finished difference Result 104360 states and 423551 transitions. [2021-07-09 18:28:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:28:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:34,090 INFO L225 Difference]: With dead ends: 104360 [2021-07-09 18:28:34,090 INFO L226 Difference]: Without dead ends: 104240 [2021-07-09 18:28:34,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1510.2ms TimeCoverageRelationStatistics Valid=586, Invalid=3074, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:28:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104240 states. [2021-07-09 18:28:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104240 to 39614. [2021-07-09 18:28:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39614 states, 39613 states have (on average 4.146971953651579) internal successors, (164274), 39613 states have internal predecessors, (164274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39614 states to 39614 states and 164274 transitions. [2021-07-09 18:28:35,995 INFO L78 Accepts]: Start accepts. Automaton has 39614 states and 164274 transitions. Word has length 39 [2021-07-09 18:28:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:35,995 INFO L482 AbstractCegarLoop]: Abstraction has 39614 states and 164274 transitions. [2021-07-09 18:28:35,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39614 states and 164274 transitions. [2021-07-09 18:28:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:36,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:36,094 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:36,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 18:28:36,295 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1895467137, now seen corresponding path program 75 times [2021-07-09 18:28:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241221340] [2021-07-09 18:28:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:36,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:36,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241221340] [2021-07-09 18:28:36,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241221340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:36,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353042843] [2021-07-09 18:28:36,562 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:36,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:28:36,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:36,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:28:36,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:36,976 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 18:28:37,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:28:37,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:37,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:28:37,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:61 [2021-07-09 18:28:37,322 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_20, v_prenex_18], 3=[q1]} [2021-07-09 18:28:37,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,331 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-09 18:28:37,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:28:37,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,387 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-09 18:28:37,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:28:37,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:37,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:28:37,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:37,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 18:28:37,513 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:168, output treesize:166 [2021-07-09 18:28:37,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,716 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:28:37,717 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:37,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:37,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:37,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-09 18:28:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:37,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353042843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:37,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:37,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:28:37,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251216416] [2021-07-09 18:28:37,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:28:37,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:28:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:28:37,826 INFO L87 Difference]: Start difference. First operand 39614 states and 164274 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:40,808 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-07-09 18:28:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:43,028 INFO L93 Difference]: Finished difference Result 80724 states and 325313 transitions. [2021-07-09 18:28:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:28:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:43,518 INFO L225 Difference]: With dead ends: 80724 [2021-07-09 18:28:43,519 INFO L226 Difference]: Without dead ends: 80450 [2021-07-09 18:28:43,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 4215.2ms TimeCoverageRelationStatistics Valid=1241, Invalid=6769, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:28:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80450 states. [2021-07-09 18:28:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80450 to 39763. [2021-07-09 18:28:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39763 states, 39762 states have (on average 4.144761329912982) internal successors, (164804), 39762 states have internal predecessors, (164804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39763 states to 39763 states and 164804 transitions. [2021-07-09 18:28:45,225 INFO L78 Accepts]: Start accepts. Automaton has 39763 states and 164804 transitions. Word has length 39 [2021-07-09 18:28:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:45,225 INFO L482 AbstractCegarLoop]: Abstraction has 39763 states and 164804 transitions. [2021-07-09 18:28:45,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 39763 states and 164804 transitions. [2021-07-09 18:28:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:45,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:45,312 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:45,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 18:28:45,512 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1621561025, now seen corresponding path program 76 times [2021-07-09 18:28:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:45,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068891091] [2021-07-09 18:28:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:45,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068891091] [2021-07-09 18:28:45,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068891091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127179520] [2021-07-09 18:28:45,786 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:45,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:45,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:45,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:45,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:28:45,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:45,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:28:46,037 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:46,037 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:28:46,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:46,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:46,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:46,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:28:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:46,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127179520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:46,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:46,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:28:46,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666020100] [2021-07-09 18:28:46,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:46,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:28:46,250 INFO L87 Difference]: Start difference. First operand 39763 states and 164804 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:48,162 INFO L93 Difference]: Finished difference Result 94767 states and 386325 transitions. [2021-07-09 18:28:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:28:48,162 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:48,788 INFO L225 Difference]: With dead ends: 94767 [2021-07-09 18:28:48,789 INFO L226 Difference]: Without dead ends: 94685 [2021-07-09 18:28:48,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1033.7ms TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:28:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94685 states. [2021-07-09 18:28:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94685 to 39969. [2021-07-09 18:28:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39969 states, 39968 states have (on average 4.144115292233787) internal successors, (165632), 39968 states have internal predecessors, (165632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39969 states to 39969 states and 165632 transitions. [2021-07-09 18:28:50,535 INFO L78 Accepts]: Start accepts. Automaton has 39969 states and 165632 transitions. Word has length 39 [2021-07-09 18:28:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:50,535 INFO L482 AbstractCegarLoop]: Abstraction has 39969 states and 165632 transitions. [2021-07-09 18:28:50,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 39969 states and 165632 transitions. [2021-07-09 18:28:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:50,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:50,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:50,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:50,832 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash -32263573, now seen corresponding path program 77 times [2021-07-09 18:28:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:50,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230069857] [2021-07-09 18:28:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:51,321 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-07-09 18:28:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:51,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230069857] [2021-07-09 18:28:51,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230069857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321891240] [2021-07-09 18:28:51,368 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:51,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:28:51,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:51,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:28:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:51,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:51,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:28:51,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:51,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:51,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:28:51,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:68 [2021-07-09 18:28:52,017 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_28], 6=[q1, v_prenex_26]} [2021-07-09 18:28:52,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:52,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-07-09 18:28:52,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:52,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:52,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:52,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-07-09 18:28:52,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:28:52,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:52,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-07-09 18:28:52,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 18:28:52,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 18:28:52,196 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:181, output treesize:84 [2021-07-09 18:28:52,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,309 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:28:52,310 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:52,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:52,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:11 [2021-07-09 18:28:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:52,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321891240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:52,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:52,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:28:52,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723703324] [2021-07-09 18:28:52,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:28:52,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:52,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:28:52,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:28:52,369 INFO L87 Difference]: Start difference. First operand 39969 states and 165632 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:52,549 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-07-09 18:28:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:59,014 INFO L93 Difference]: Finished difference Result 111989 states and 453363 transitions. [2021-07-09 18:28:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:28:59,014 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:59,484 INFO L225 Difference]: With dead ends: 111989 [2021-07-09 18:28:59,484 INFO L226 Difference]: Without dead ends: 111570 [2021-07-09 18:28:59,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 4622.9ms TimeCoverageRelationStatistics Valid=1232, Invalid=8080, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:28:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111570 states. [2021-07-09 18:29:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111570 to 40153. [2021-07-09 18:29:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-09 18:29:01,589 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-09 18:29:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:01,589 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-09 18:29:01,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-09 18:29:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:01,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:01,679 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:01,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-09 18:29:01,879 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1810739247, now seen corresponding path program 78 times [2021-07-09 18:29:01,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:01,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25242328] [2021-07-09 18:29:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:02,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25242328] [2021-07-09 18:29:02,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25242328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843240821] [2021-07-09 18:29:02,171 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:02,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:29:02,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:02,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:02,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:02,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:29:02,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:29:02,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-09 18:29:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:02,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:29:02,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:02,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:28 [2021-07-09 18:29:02,687 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:29:02,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,702 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:29:02,703 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:02,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:02,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:02,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-07-09 18:29:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:02,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843240821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:02,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:02,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:29:02,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978679907] [2021-07-09 18:29:02,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:29:02,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:29:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:29:02,789 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:08,854 INFO L93 Difference]: Finished difference Result 120932 states and 494689 transitions. [2021-07-09 18:29:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 18:29:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:09,613 INFO L225 Difference]: With dead ends: 120932 [2021-07-09 18:29:09,613 INFO L226 Difference]: Without dead ends: 120663 [2021-07-09 18:29:09,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 4517.9ms TimeCoverageRelationStatistics Valid=1668, Invalid=9888, Unknown=0, NotChecked=0, Total=11556 [2021-07-09 18:29:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120663 states. [2021-07-09 18:29:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120663 to 40812. [2021-07-09 18:29:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40812 states, 40811 states have (on average 4.141922520888976) internal successors, (169036), 40811 states have internal predecessors, (169036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40812 states to 40812 states and 169036 transitions. [2021-07-09 18:29:11,863 INFO L78 Accepts]: Start accepts. Automaton has 40812 states and 169036 transitions. Word has length 39 [2021-07-09 18:29:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:11,863 INFO L482 AbstractCegarLoop]: Abstraction has 40812 states and 169036 transitions. [2021-07-09 18:29:11,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 40812 states and 169036 transitions. [2021-07-09 18:29:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:11,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:11,953 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:12,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:12,155 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1846957111, now seen corresponding path program 79 times [2021-07-09 18:29:12,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:12,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116229645] [2021-07-09 18:29:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:12,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:12,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116229645] [2021-07-09 18:29:12,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116229645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:12,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207943805] [2021-07-09 18:29:12,437 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:12,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:12,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:12,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:12,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:12,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:12,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:29:12,668 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:12,668 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:29:12,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:12,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:12,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:12,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:29:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:12,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207943805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:12,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:12,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:12,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401036625] [2021-07-09 18:29:12,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:12,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:12,735 INFO L87 Difference]: Start difference. First operand 40812 states and 169036 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:13,065 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-09 18:29:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:15,003 INFO L93 Difference]: Finished difference Result 93840 states and 382143 transitions. [2021-07-09 18:29:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:29:15,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:15,564 INFO L225 Difference]: With dead ends: 93840 [2021-07-09 18:29:15,564 INFO L226 Difference]: Without dead ends: 93766 [2021-07-09 18:29:15,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1228.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:29:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93766 states. [2021-07-09 18:29:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93766 to 40153. [2021-07-09 18:29:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-09 18:29:17,257 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-09 18:29:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:17,258 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-09 18:29:17,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-09 18:29:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:17,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:17,352 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:17,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:17,552 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 247806187, now seen corresponding path program 80 times [2021-07-09 18:29:17,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:17,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843205079] [2021-07-09 18:29:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:18,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:18,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843205079] [2021-07-09 18:29:18,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843205079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:18,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007776799] [2021-07-09 18:29:18,109 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:18,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:18,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:18,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:18,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:18,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:18,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:18,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:18,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:18,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:29:18,377 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:18,377 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:18,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:18,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:18,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:18,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:29:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:18,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007776799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:18,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:18,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:18,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836715289] [2021-07-09 18:29:18,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:18,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:18,419 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:21,275 INFO L93 Difference]: Finished difference Result 116370 states and 472671 transitions. [2021-07-09 18:29:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:29:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:22,033 INFO L225 Difference]: With dead ends: 116370 [2021-07-09 18:29:22,033 INFO L226 Difference]: Without dead ends: 116234 [2021-07-09 18:29:22,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1559.9ms TimeCoverageRelationStatistics Valid=533, Invalid=2889, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:29:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116234 states. [2021-07-09 18:29:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116234 to 39521. [2021-07-09 18:29:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39521 states, 39520 states have (on average 4.145141700404858) internal successors, (163816), 39520 states have internal predecessors, (163816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39521 states to 39521 states and 163816 transitions. [2021-07-09 18:29:23,993 INFO L78 Accepts]: Start accepts. Automaton has 39521 states and 163816 transitions. Word has length 39 [2021-07-09 18:29:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:23,993 INFO L482 AbstractCegarLoop]: Abstraction has 39521 states and 163816 transitions. [2021-07-09 18:29:23,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 39521 states and 163816 transitions. [2021-07-09 18:29:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:24,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:24,285 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:24,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:24,501 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2140222515, now seen corresponding path program 81 times [2021-07-09 18:29:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:24,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220483481] [2021-07-09 18:29:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:24,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:24,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220483481] [2021-07-09 18:29:24,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220483481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:24,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273850458] [2021-07-09 18:29:24,748 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:24,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:29:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:29:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:24,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:24,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:29:24,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:25,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:25,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:78 [2021-07-09 18:29:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:25,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2021-07-09 18:29:25,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:25,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,140 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-07-09 18:29:25,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:29:25,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:25,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2021-07-09 18:29:25,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:25,168 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:29:25,168 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-07-09 18:29:25,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:25,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:29:25,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:243, output treesize:308 [2021-07-09 18:29:25,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,441 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:29:25,442 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:25,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:29:25,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:25,500 INFO L628 ElimStorePlain]: treesize reduction 23, result has 64.1 percent of original size [2021-07-09 18:29:25,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:25,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:76, output treesize:42 [2021-07-09 18:29:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:25,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273850458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:25,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:25,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:29:25,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097146076] [2021-07-09 18:29:25,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:29:25,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:29:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:29:25,754 INFO L87 Difference]: Start difference. First operand 39521 states and 163816 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:28,549 INFO L93 Difference]: Finished difference Result 77354 states and 314932 transitions. [2021-07-09 18:29:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:29:28,549 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:28,869 INFO L225 Difference]: With dead ends: 77354 [2021-07-09 18:29:28,869 INFO L226 Difference]: Without dead ends: 77244 [2021-07-09 18:29:28,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2174.2ms TimeCoverageRelationStatistics Valid=693, Invalid=2847, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:29:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77244 states. [2021-07-09 18:29:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77244 to 39808. [2021-07-09 18:29:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39808 states, 39807 states have (on average 4.143693320270304) internal successors, (164948), 39807 states have internal predecessors, (164948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39808 states to 39808 states and 164948 transitions. [2021-07-09 18:29:30,338 INFO L78 Accepts]: Start accepts. Automaton has 39808 states and 164948 transitions. Word has length 39 [2021-07-09 18:29:30,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:30,338 INFO L482 AbstractCegarLoop]: Abstraction has 39808 states and 164948 transitions. [2021-07-09 18:29:30,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 39808 states and 164948 transitions. [2021-07-09 18:29:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:30,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:30,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:30,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-09 18:29:30,630 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash 458385605, now seen corresponding path program 82 times [2021-07-09 18:29:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:30,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126987513] [2021-07-09 18:29:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:30,915 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-09 18:29:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:31,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126987513] [2021-07-09 18:29:31,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126987513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:31,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999131678] [2021-07-09 18:29:31,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:31,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:31,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:31,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:31,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:31,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:29:31,350 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:29:31,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:31,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:29:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:31,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999131678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:31,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:31,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:31,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868155269] [2021-07-09 18:29:31,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:31,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:31,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:31,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:31,406 INFO L87 Difference]: Start difference. First operand 39808 states and 164948 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:33,604 INFO L93 Difference]: Finished difference Result 98952 states and 404548 transitions. [2021-07-09 18:29:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:29:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:34,128 INFO L225 Difference]: With dead ends: 98952 [2021-07-09 18:29:34,128 INFO L226 Difference]: Without dead ends: 98897 [2021-07-09 18:29:34,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1198.5ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:29:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98897 states. [2021-07-09 18:29:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98897 to 41626. [2021-07-09 18:29:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41626 states, 41625 states have (on average 4.144912912912913) internal successors, (172532), 41625 states have internal predecessors, (172532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41626 states to 41626 states and 172532 transitions. [2021-07-09 18:29:36,143 INFO L78 Accepts]: Start accepts. Automaton has 41626 states and 172532 transitions. Word has length 39 [2021-07-09 18:29:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:36,143 INFO L482 AbstractCegarLoop]: Abstraction has 41626 states and 172532 transitions. [2021-07-09 18:29:36,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 41626 states and 172532 transitions. [2021-07-09 18:29:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:36,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:36,247 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:36,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 18:29:36,447 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash -798003409, now seen corresponding path program 83 times [2021-07-09 18:29:36,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:36,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208346370] [2021-07-09 18:29:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:36,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208346370] [2021-07-09 18:29:36,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208346370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:36,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051361135] [2021-07-09 18:29:36,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:36,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:29:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:36,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:29:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:36,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:36,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:36,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:29:36,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:36,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-09 18:29:36,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:36,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:36,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:36,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2021-07-09 18:29:37,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:37,039 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:29:37,040 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:37,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:37,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:37,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:29:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:37,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051361135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:37,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:37,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:29:37,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329770054] [2021-07-09 18:29:37,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:29:37,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:37,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:29:37,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:29:37,091 INFO L87 Difference]: Start difference. First operand 41626 states and 172532 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,503 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-09 18:29:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:40,902 INFO L93 Difference]: Finished difference Result 86010 states and 349681 transitions. [2021-07-09 18:29:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:29:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:41,414 INFO L225 Difference]: With dead ends: 86010 [2021-07-09 18:29:41,414 INFO L226 Difference]: Without dead ends: 85900 [2021-07-09 18:29:41,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 2668.2ms TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:29:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85900 states. [2021-07-09 18:29:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85900 to 42486. [2021-07-09 18:29:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42486 states, 42485 states have (on average 4.143580087089561) internal successors, (176040), 42485 states have internal predecessors, (176040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42486 states to 42486 states and 176040 transitions. [2021-07-09 18:29:43,236 INFO L78 Accepts]: Start accepts. Automaton has 42486 states and 176040 transitions. Word has length 39 [2021-07-09 18:29:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:43,237 INFO L482 AbstractCegarLoop]: Abstraction has 42486 states and 176040 transitions. [2021-07-09 18:29:43,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 42486 states and 176040 transitions. [2021-07-09 18:29:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:43,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:43,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:43,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-09 18:29:43,580 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1274133635, now seen corresponding path program 84 times [2021-07-09 18:29:43,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:43,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487839973] [2021-07-09 18:29:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:43,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:43,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487839973] [2021-07-09 18:29:43,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487839973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:43,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708474719] [2021-07-09 18:29:43,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:43,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:29:43,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:43,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:29:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:43,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:43,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:43,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:43,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:43,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:29:44,061 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:44,061 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:44,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:44,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:44,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:44,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:29:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:44,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708474719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:44,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:44,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27676985] [2021-07-09 18:29:44,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:44,102 INFO L87 Difference]: Start difference. First operand 42486 states and 176040 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:44,743 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-07-09 18:29:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:46,355 INFO L93 Difference]: Finished difference Result 100201 states and 409486 transitions. [2021-07-09 18:29:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:29:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:46,995 INFO L225 Difference]: With dead ends: 100201 [2021-07-09 18:29:46,995 INFO L226 Difference]: Without dead ends: 100146 [2021-07-09 18:29:46,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:29:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100146 states. [2021-07-09 18:29:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100146 to 41898. [2021-07-09 18:29:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41898 states, 41897 states have (on average 4.146358927846863) internal successors, (173720), 41897 states have internal predecessors, (173720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41898 states to 41898 states and 173720 transitions. [2021-07-09 18:29:48,670 INFO L78 Accepts]: Start accepts. Automaton has 41898 states and 173720 transitions. Word has length 39 [2021-07-09 18:29:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:48,670 INFO L482 AbstractCegarLoop]: Abstraction has 41898 states and 173720 transitions. [2021-07-09 18:29:48,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 41898 states and 173720 transitions. [2021-07-09 18:29:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:48,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:48,764 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:48,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:48,965 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash 691348715, now seen corresponding path program 85 times [2021-07-09 18:29:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:48,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896111687] [2021-07-09 18:29:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:49,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896111687] [2021-07-09 18:29:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896111687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90731887] [2021-07-09 18:29:49,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:49,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:49,503 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-09 18:29:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:49,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:49,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:49,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:49,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:29:49,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:49,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:49,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:49,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:49,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:29:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:49,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90731887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:49,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:49,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:49,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217614220] [2021-07-09 18:29:49,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:49,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:49,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:49,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:49,710 INFO L87 Difference]: Start difference. First operand 41898 states and 173720 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:51,469 INFO L93 Difference]: Finished difference Result 82479 states and 338687 transitions. [2021-07-09 18:29:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:29:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:52,012 INFO L225 Difference]: With dead ends: 82479 [2021-07-09 18:29:52,012 INFO L226 Difference]: Without dead ends: 82424 [2021-07-09 18:29:52,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=337, Invalid=1385, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:29:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82424 states. [2021-07-09 18:29:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82424 to 41202. [2021-07-09 18:29:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41202 states, 41201 states have (on average 4.142520812601636) internal successors, (170676), 41201 states have internal predecessors, (170676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41202 states to 41202 states and 170676 transitions. [2021-07-09 18:29:53,600 INFO L78 Accepts]: Start accepts. Automaton has 41202 states and 170676 transitions. Word has length 39 [2021-07-09 18:29:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:53,600 INFO L482 AbstractCegarLoop]: Abstraction has 41202 states and 170676 transitions. [2021-07-09 18:29:53,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 41202 states and 170676 transitions. [2021-07-09 18:29:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:53,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:53,694 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:53,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-09 18:29:53,894 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash 983531635, now seen corresponding path program 86 times [2021-07-09 18:29:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:53,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958125335] [2021-07-09 18:29:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958125335] [2021-07-09 18:29:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958125335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492782908] [2021-07-09 18:29:54,131 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:54,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:54,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:54,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:54,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:54,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:54,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:54,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:54,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:29:54,371 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:54,371 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:54,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:54,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:54,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:54,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:29:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:54,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492782908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:54,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:54,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:54,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376269607] [2021-07-09 18:29:54,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:54,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:54,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:54,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:54,620 INFO L87 Difference]: Start difference. First operand 41202 states and 170676 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:56,308 INFO L93 Difference]: Finished difference Result 85275 states and 350117 transitions. [2021-07-09 18:29:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:29:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:56,839 INFO L225 Difference]: With dead ends: 85275 [2021-07-09 18:29:56,839 INFO L226 Difference]: Without dead ends: 85220 [2021-07-09 18:29:56,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 802.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:29:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85220 states. [2021-07-09 18:29:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85220 to 41643. [2021-07-09 18:29:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41643 states, 41642 states have (on average 4.147975601556121) internal successors, (172730), 41642 states have internal predecessors, (172730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41643 states to 41643 states and 172730 transitions. [2021-07-09 18:29:58,458 INFO L78 Accepts]: Start accepts. Automaton has 41643 states and 172730 transitions. Word has length 39 [2021-07-09 18:29:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:58,458 INFO L482 AbstractCegarLoop]: Abstraction has 41643 states and 172730 transitions. [2021-07-09 18:29:58,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 41643 states and 172730 transitions. [2021-07-09 18:29:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:58,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:58,553 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:58,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-07-09 18:29:58,761 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1822083537, now seen corresponding path program 87 times [2021-07-09 18:29:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:58,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594058358] [2021-07-09 18:29:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:58,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:58,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594058358] [2021-07-09 18:29:58,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594058358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:58,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77587674] [2021-07-09 18:29:58,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:59,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:29:59,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:29:59,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 18:29:59,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:59,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:59,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:59,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2021-07-09 18:29:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:59,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:59,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:29:59,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:59,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:59,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:29:59,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-07-09 18:29:59,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:59,502 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:29:59,503 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:59,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:59,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:59,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-07-09 18:29:59,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:59,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:59,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:29:59,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-09 18:29:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:59,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77587674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:59,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:59,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:29:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313254912] [2021-07-09 18:29:59,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:29:59,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:29:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:29:59,626 INFO L87 Difference]: Start difference. First operand 41643 states and 172730 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:04,258 INFO L93 Difference]: Finished difference Result 98168 states and 401438 transitions. [2021-07-09 18:30:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:30:04,259 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:04,724 INFO L225 Difference]: With dead ends: 98168 [2021-07-09 18:30:04,725 INFO L226 Difference]: Without dead ends: 98026 [2021-07-09 18:30:04,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 3347.3ms TimeCoverageRelationStatistics Valid=1322, Invalid=6160, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:30:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98026 states. [2021-07-09 18:30:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98026 to 43365. [2021-07-09 18:30:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43365 states, 43364 states have (on average 4.146642376164561) internal successors, (179815), 43364 states have internal predecessors, (179815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43365 states to 43365 states and 179815 transitions. [2021-07-09 18:30:06,915 INFO L78 Accepts]: Start accepts. Automaton has 43365 states and 179815 transitions. Word has length 39 [2021-07-09 18:30:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:06,916 INFO L482 AbstractCegarLoop]: Abstraction has 43365 states and 179815 transitions. [2021-07-09 18:30:06,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 43365 states and 179815 transitions. [2021-07-09 18:30:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:07,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:07,035 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:07,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:07,236 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1184812599, now seen corresponding path program 88 times [2021-07-09 18:30:07,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:07,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899961331] [2021-07-09 18:30:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:07,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:07,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899961331] [2021-07-09 18:30:07,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899961331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:07,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143470887] [2021-07-09 18:30:07,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:07,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:30:07,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:07,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:07,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:07,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:07,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:07,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:30:07,998 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:07,998 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:30:07,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:08,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:08,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:08,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:30:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:08,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143470887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:08,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:08,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:08,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790966053] [2021-07-09 18:30:08,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:08,039 INFO L87 Difference]: Start difference. First operand 43365 states and 179815 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:10,347 INFO L93 Difference]: Finished difference Result 100263 states and 410482 transitions. [2021-07-09 18:30:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:30:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:10,846 INFO L225 Difference]: With dead ends: 100263 [2021-07-09 18:30:10,846 INFO L226 Difference]: Without dead ends: 100208 [2021-07-09 18:30:10,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1228.4ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:30:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100208 states. [2021-07-09 18:30:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100208 to 41371. [2021-07-09 18:30:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41371 states, 41370 states have (on average 4.146531302876481) internal successors, (171542), 41370 states have internal predecessors, (171542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41371 states to 41371 states and 171542 transitions. [2021-07-09 18:30:12,754 INFO L78 Accepts]: Start accepts. Automaton has 41371 states and 171542 transitions. Word has length 39 [2021-07-09 18:30:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:12,754 INFO L482 AbstractCegarLoop]: Abstraction has 41371 states and 171542 transitions. [2021-07-09 18:30:12,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 41371 states and 171542 transitions. [2021-07-09 18:30:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:13,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:13,117 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:13,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:13,333 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2134546223, now seen corresponding path program 89 times [2021-07-09 18:30:13,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:13,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166428143] [2021-07-09 18:30:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:13,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166428143] [2021-07-09 18:30:13,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166428143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928155990] [2021-07-09 18:30:13,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:13,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:30:13,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:13,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:13,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 18:30:13,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:28 [2021-07-09 18:30:13,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-07-09 18:30:13,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:13,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:30 [2021-07-09 18:30:13,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:13,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:13,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:13,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:30:13,929 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:13,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:13,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-07-09 18:30:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:14,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928155990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:14,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:14,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:30:14,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335188157] [2021-07-09 18:30:14,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:30:14,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:30:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:30:14,018 INFO L87 Difference]: Start difference. First operand 41371 states and 171542 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:17,824 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-09 18:30:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:18,817 INFO L93 Difference]: Finished difference Result 111193 states and 459274 transitions. [2021-07-09 18:30:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:30:18,817 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:19,391 INFO L225 Difference]: With dead ends: 111193 [2021-07-09 18:30:19,391 INFO L226 Difference]: Without dead ends: 111083 [2021-07-09 18:30:19,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2907.3ms TimeCoverageRelationStatistics Valid=1109, Invalid=5211, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:30:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111083 states. [2021-07-09 18:30:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111083 to 42114. [2021-07-09 18:30:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42114 states, 42113 states have (on average 4.147104219599648) internal successors, (174647), 42113 states have internal predecessors, (174647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42114 states to 42114 states and 174647 transitions. [2021-07-09 18:30:21,632 INFO L78 Accepts]: Start accepts. Automaton has 42114 states and 174647 transitions. Word has length 39 [2021-07-09 18:30:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:21,632 INFO L482 AbstractCegarLoop]: Abstraction has 42114 states and 174647 transitions. [2021-07-09 18:30:21,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 42114 states and 174647 transitions. [2021-07-09 18:30:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:21,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:21,736 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:21,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:21,937 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1523150135, now seen corresponding path program 90 times [2021-07-09 18:30:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:21,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619307870] [2021-07-09 18:30:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:22,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:22,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619307870] [2021-07-09 18:30:22,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619307870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:22,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410309658] [2021-07-09 18:30:22,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:22,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:30:22,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:22,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:30:22,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:22,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:22,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:22,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:22,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:22,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:30:22,410 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:22,410 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:30:22,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:22,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:22,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:22,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-09 18:30:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:22,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410309658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:22,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:22,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:22,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968710875] [2021-07-09 18:30:22,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:22,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:22,468 INFO L87 Difference]: Start difference. First operand 42114 states and 174647 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:24,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:24,862 INFO L93 Difference]: Finished difference Result 96972 states and 397209 transitions. [2021-07-09 18:30:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:30:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:25,511 INFO L225 Difference]: With dead ends: 96972 [2021-07-09 18:30:25,511 INFO L226 Difference]: Without dead ends: 96917 [2021-07-09 18:30:25,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 997.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:30:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96917 states. [2021-07-09 18:30:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96917 to 41581. [2021-07-09 18:30:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41581 states, 41580 states have (on average 4.149446849446849) internal successors, (172534), 41580 states have internal predecessors, (172534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41581 states to 41581 states and 172534 transitions. [2021-07-09 18:30:27,324 INFO L78 Accepts]: Start accepts. Automaton has 41581 states and 172534 transitions. Word has length 39 [2021-07-09 18:30:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:27,324 INFO L482 AbstractCegarLoop]: Abstraction has 41581 states and 172534 transitions. [2021-07-09 18:30:27,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 41581 states and 172534 transitions. [2021-07-09 18:30:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:27,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:27,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:27,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-09 18:30:27,632 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 91 times [2021-07-09 18:30:27,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:27,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862965114] [2021-07-09 18:30:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:27,913 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:30:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:28,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:28,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862965114] [2021-07-09 18:30:28,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862965114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:28,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134449517] [2021-07-09 18:30:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:28,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:28,317 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:28,317 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:30:28,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:28,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:28,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:28,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:30:28,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:30:28,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:28,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:28,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:28,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:30:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:28,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134449517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:28,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:28,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:28,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726566874] [2021-07-09 18:30:28,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:28,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:28,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:28,476 INFO L87 Difference]: Start difference. First operand 41581 states and 172534 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:30,252 INFO L93 Difference]: Finished difference Result 70550 states and 289014 transitions. [2021-07-09 18:30:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:30:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:30,827 INFO L225 Difference]: With dead ends: 70550 [2021-07-09 18:30:30,827 INFO L226 Difference]: Without dead ends: 70358 [2021-07-09 18:30:30,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1359.2ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:30:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70358 states. [2021-07-09 18:30:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70358 to 41754. [2021-07-09 18:30:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41754 states, 41753 states have (on average 4.147246904414054) internal successors, (173160), 41753 states have internal predecessors, (173160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41754 states to 41754 states and 173160 transitions. [2021-07-09 18:30:32,566 INFO L78 Accepts]: Start accepts. Automaton has 41754 states and 173160 transitions. Word has length 39 [2021-07-09 18:30:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:32,566 INFO L482 AbstractCegarLoop]: Abstraction has 41754 states and 173160 transitions. [2021-07-09 18:30:32,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 41754 states and 173160 transitions. [2021-07-09 18:30:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:32,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:32,678 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:32,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:32,879 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1579983005, now seen corresponding path program 92 times [2021-07-09 18:30:32,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:32,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303873347] [2021-07-09 18:30:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:33,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:33,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303873347] [2021-07-09 18:30:33,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303873347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:33,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582837881] [2021-07-09 18:30:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:33,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:33,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:33,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:33,311 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:33,311 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:30:33,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:33,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:33,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:33,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:30:33,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:30:33,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:33,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:33,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:33,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:30:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:33,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582837881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:33,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:33,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:33,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531722253] [2021-07-09 18:30:33,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:33,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:33,477 INFO L87 Difference]: Start difference. First operand 41754 states and 173160 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:35,684 INFO L93 Difference]: Finished difference Result 71559 states and 293044 transitions. [2021-07-09 18:30:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:30:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:35,975 INFO L225 Difference]: With dead ends: 71559 [2021-07-09 18:30:35,975 INFO L226 Difference]: Without dead ends: 71343 [2021-07-09 18:30:35,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1121.2ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:30:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71343 states. [2021-07-09 18:30:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71343 to 41816. [2021-07-09 18:30:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41816 states, 41815 states have (on average 4.1483678105942845) internal successors, (173464), 41815 states have internal predecessors, (173464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41816 states to 41816 states and 173464 transitions. [2021-07-09 18:30:37,445 INFO L78 Accepts]: Start accepts. Automaton has 41816 states and 173464 transitions. Word has length 39 [2021-07-09 18:30:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:37,446 INFO L482 AbstractCegarLoop]: Abstraction has 41816 states and 173464 transitions. [2021-07-09 18:30:37,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 41816 states and 173464 transitions. [2021-07-09 18:30:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:37,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:37,554 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:37,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:37,755 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash 231872611, now seen corresponding path program 93 times [2021-07-09 18:30:37,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:37,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44842367] [2021-07-09 18:30:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:38,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:38,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44842367] [2021-07-09 18:30:38,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44842367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:38,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833161713] [2021-07-09 18:30:38,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:38,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:30:38,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:30:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:38,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:38,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:38,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:30:38,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:38,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:38,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:38,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:85 [2021-07-09 18:30:38,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:38,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:30:38,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:38,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:38,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:38,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:43 [2021-07-09 18:30:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:38,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:38,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-07-09 18:30:38,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:30:38,734 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:30:38,734 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-07-09 18:30:38,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:38,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:38,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:30:38,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:38,789 INFO L628 ElimStorePlain]: treesize reduction 36, result has 60.0 percent of original size [2021-07-09 18:30:38,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:30:38,791 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:111, output treesize:45 [2021-07-09 18:30:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:38,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833161713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:38,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:38,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:30:38,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16269095] [2021-07-09 18:30:38,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:30:38,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:30:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:30:38,910 INFO L87 Difference]: Start difference. First operand 41816 states and 173464 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:41,561 INFO L93 Difference]: Finished difference Result 69576 states and 283666 transitions. [2021-07-09 18:30:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:30:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:41,840 INFO L225 Difference]: With dead ends: 69576 [2021-07-09 18:30:41,840 INFO L226 Difference]: Without dead ends: 69466 [2021-07-09 18:30:41,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1784.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2638, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:30:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69466 states. [2021-07-09 18:30:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69466 to 42033. [2021-07-09 18:30:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42033 states, 42032 states have (on average 4.145365435858394) internal successors, (174238), 42032 states have internal predecessors, (174238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42033 states to 42033 states and 174238 transitions. [2021-07-09 18:30:43,495 INFO L78 Accepts]: Start accepts. Automaton has 42033 states and 174238 transitions. Word has length 39 [2021-07-09 18:30:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:43,495 INFO L482 AbstractCegarLoop]: Abstraction has 42033 states and 174238 transitions. [2021-07-09 18:30:43,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 42033 states and 174238 transitions. [2021-07-09 18:30:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:43,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:43,612 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:43,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:43,813 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1449964299, now seen corresponding path program 94 times [2021-07-09 18:30:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:43,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517861791] [2021-07-09 18:30:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:44,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517861791] [2021-07-09 18:30:44,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517861791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317169990] [2021-07-09 18:30:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:44,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:30:44,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:44,203 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:44,203 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:30:44,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:44,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:44,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:44,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:30:44,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:30:44,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:44,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:44,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:44,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:30:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:44,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317169990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:44,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:44,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:44,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264943903] [2021-07-09 18:30:44,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:44,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:44,349 INFO L87 Difference]: Start difference. First operand 42033 states and 174238 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:46,473 INFO L93 Difference]: Finished difference Result 89826 states and 367488 transitions. [2021-07-09 18:30:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:30:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:46,850 INFO L225 Difference]: With dead ends: 89826 [2021-07-09 18:30:46,850 INFO L226 Difference]: Without dead ends: 89771 [2021-07-09 18:30:46,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 903.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:30:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89771 states. [2021-07-09 18:30:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89771 to 41715. [2021-07-09 18:30:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41715 states, 41714 states have (on average 4.14752840772882) internal successors, (173010), 41714 states have internal predecessors, (173010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41715 states to 41715 states and 173010 transitions. [2021-07-09 18:30:48,781 INFO L78 Accepts]: Start accepts. Automaton has 41715 states and 173010 transitions. Word has length 39 [2021-07-09 18:30:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:48,781 INFO L482 AbstractCegarLoop]: Abstraction has 41715 states and 173010 transitions. [2021-07-09 18:30:48,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 41715 states and 173010 transitions. [2021-07-09 18:30:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:48,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:48,891 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:49,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-09 18:30:49,092 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 95 times [2021-07-09 18:30:49,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:49,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749266645] [2021-07-09 18:30:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:49,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749266645] [2021-07-09 18:30:49,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749266645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248545054] [2021-07-09 18:30:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:49,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:30:49,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:49,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:49,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:49,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:49,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-09 18:30:49,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:30:49,616 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-07-09 18:30:49,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-07-09 18:30:49,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:30:49,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:49,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:49,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:30:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248545054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:49,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:49,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:30:49,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252568842] [2021-07-09 18:30:49,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:30:49,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:30:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:30:49,988 INFO L87 Difference]: Start difference. First operand 41715 states and 173010 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:52,357 INFO L93 Difference]: Finished difference Result 68574 states and 280232 transitions. [2021-07-09 18:30:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:30:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:52,763 INFO L225 Difference]: With dead ends: 68574 [2021-07-09 18:30:52,763 INFO L226 Difference]: Without dead ends: 68446 [2021-07-09 18:30:52,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:30:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68446 states. [2021-07-09 18:30:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68446 to 42130. [2021-07-09 18:30:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42130 states, 42129 states have (on average 4.142562130598875) internal successors, (174522), 42129 states have internal predecessors, (174522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42130 states to 42130 states and 174522 transitions. [2021-07-09 18:30:54,239 INFO L78 Accepts]: Start accepts. Automaton has 42130 states and 174522 transitions. Word has length 39 [2021-07-09 18:30:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:54,239 INFO L482 AbstractCegarLoop]: Abstraction has 42130 states and 174522 transitions. [2021-07-09 18:30:54,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42130 states and 174522 transitions. [2021-07-09 18:30:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:54,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:54,334 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:54,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-09 18:30:54,534 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash 167393013, now seen corresponding path program 96 times [2021-07-09 18:30:54,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:54,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269607555] [2021-07-09 18:30:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:54,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:54,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269607555] [2021-07-09 18:30:54,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269607555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:54,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421024414] [2021-07-09 18:30:54,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:54,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:30:54,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:30:54,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:55,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:55,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:30:55,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:55,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:55,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:55,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-07-09 18:30:55,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:30:55,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:55,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:55,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:55,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:30:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:55,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421024414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:55,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:55,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:30:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552887728] [2021-07-09 18:30:55,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:30:55,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:55,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:30:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:30:55,375 INFO L87 Difference]: Start difference. First operand 42130 states and 174522 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:57,525 INFO L93 Difference]: Finished difference Result 69626 states and 284381 transitions. [2021-07-09 18:30:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:30:57,526 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:57,925 INFO L225 Difference]: With dead ends: 69626 [2021-07-09 18:30:57,926 INFO L226 Difference]: Without dead ends: 69498 [2021-07-09 18:30:57,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1595.1ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:30:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69498 states. [2021-07-09 18:30:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69498 to 42280. [2021-07-09 18:30:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42280 states, 42279 states have (on average 4.141772511175761) internal successors, (175110), 42279 states have internal predecessors, (175110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42280 states to 42280 states and 175110 transitions. [2021-07-09 18:30:59,362 INFO L78 Accepts]: Start accepts. Automaton has 42280 states and 175110 transitions. Word has length 39 [2021-07-09 18:30:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:59,362 INFO L482 AbstractCegarLoop]: Abstraction has 42280 states and 175110 transitions. [2021-07-09 18:30:59,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 42280 states and 175110 transitions. [2021-07-09 18:30:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:59,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:59,455 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:59,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:59,655 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:59,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:59,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1979248629, now seen corresponding path program 97 times [2021-07-09 18:30:59,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:59,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797869375] [2021-07-09 18:30:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:59,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797869375] [2021-07-09 18:30:59,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797869375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765240250] [2021-07-09 18:30:59,885 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:59,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:00,052 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:00,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:00,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:00,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:31:00,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:31:00,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:00,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:31:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:00,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765240250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:00,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:00,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:00,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070023835] [2021-07-09 18:31:00,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:00,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:00,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:00,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:00,179 INFO L87 Difference]: Start difference. First operand 42280 states and 175110 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:01,920 INFO L93 Difference]: Finished difference Result 75888 states and 312435 transitions. [2021-07-09 18:31:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:31:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:02,220 INFO L225 Difference]: With dead ends: 75888 [2021-07-09 18:31:02,220 INFO L226 Difference]: Without dead ends: 75833 [2021-07-09 18:31:02,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 743.3ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:31:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75833 states. [2021-07-09 18:31:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75833 to 42258. [2021-07-09 18:31:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42258 states, 42257 states have (on average 4.142248621530161) internal successors, (175039), 42257 states have internal predecessors, (175039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42258 states to 42258 states and 175039 transitions. [2021-07-09 18:31:03,638 INFO L78 Accepts]: Start accepts. Automaton has 42258 states and 175039 transitions. Word has length 39 [2021-07-09 18:31:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:03,638 INFO L482 AbstractCegarLoop]: Abstraction has 42258 states and 175039 transitions. [2021-07-09 18:31:03,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 42258 states and 175039 transitions. [2021-07-09 18:31:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:04,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:04,028 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:04,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:04,237 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash 210357187, now seen corresponding path program 98 times [2021-07-09 18:31:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:04,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197451507] [2021-07-09 18:31:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:04,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197451507] [2021-07-09 18:31:04,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197451507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951426852] [2021-07-09 18:31:04,546 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:04,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:04,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:04,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:04,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:04,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:04,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:04,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:04,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:04,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-09 18:31:04,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:04,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:04,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:04,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:04,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:31:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:04,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951426852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:04,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:04,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:04,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627329691] [2021-07-09 18:31:04,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:04,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:04,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:04,856 INFO L87 Difference]: Start difference. First operand 42258 states and 175039 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:06,992 INFO L93 Difference]: Finished difference Result 85721 states and 348629 transitions. [2021-07-09 18:31:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:31:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:07,360 INFO L225 Difference]: With dead ends: 85721 [2021-07-09 18:31:07,360 INFO L226 Difference]: Without dead ends: 85537 [2021-07-09 18:31:07,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1183.5ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:31:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85537 states. [2021-07-09 18:31:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85537 to 42230. [2021-07-09 18:31:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42230 states, 42229 states have (on average 4.142769187051552) internal successors, (174945), 42229 states have internal predecessors, (174945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42230 states to 42230 states and 174945 transitions. [2021-07-09 18:31:09,159 INFO L78 Accepts]: Start accepts. Automaton has 42230 states and 174945 transitions. Word has length 39 [2021-07-09 18:31:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:09,159 INFO L482 AbstractCegarLoop]: Abstraction has 42230 states and 174945 transitions. [2021-07-09 18:31:09,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 42230 states and 174945 transitions. [2021-07-09 18:31:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:09,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:09,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:09,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-09 18:31:09,472 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash -912760441, now seen corresponding path program 99 times [2021-07-09 18:31:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:09,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450962920] [2021-07-09 18:31:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:09,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:09,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450962920] [2021-07-09 18:31:09,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450962920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:09,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908892896] [2021-07-09 18:31:09,754 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:09,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:31:09,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:09,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:09,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:09,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:09,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:09,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:31:09,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:09,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:09,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:09,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:88 [2021-07-09 18:31:10,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-07-09 18:31:10,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:10,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:10,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:10,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:9 [2021-07-09 18:31:10,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:10,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:31:10,124 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:10,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:10,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:10,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:31:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:10,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908892896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:10,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:10,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:31:10,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173929147] [2021-07-09 18:31:10,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:31:10,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:10,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:31:10,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:31:10,179 INFO L87 Difference]: Start difference. First operand 42230 states and 174945 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:10,603 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2021-07-09 18:31:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:13,715 INFO L93 Difference]: Finished difference Result 89279 states and 362432 transitions. [2021-07-09 18:31:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:31:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:14,081 INFO L225 Difference]: With dead ends: 89279 [2021-07-09 18:31:14,081 INFO L226 Difference]: Without dead ends: 88857 [2021-07-09 18:31:14,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2228.9ms TimeCoverageRelationStatistics Valid=747, Invalid=4083, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:31:14,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88857 states. [2021-07-09 18:31:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88857 to 41749. [2021-07-09 18:31:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-09 18:31:15,871 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-09 18:31:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:15,871 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-09 18:31:15,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-09 18:31:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:15,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:15,970 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:16,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-09 18:31:16,170 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:16,170 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 100 times [2021-07-09 18:31:16,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:16,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294683645] [2021-07-09 18:31:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:16,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:16,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294683645] [2021-07-09 18:31:16,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294683645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:16,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416160208] [2021-07-09 18:31:16,458 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:16,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:16,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:16,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:16,665 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:16,665 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:31:16,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:16,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:16,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:16,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:31:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:16,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:16,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:16,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:16,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:31:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:16,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416160208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:16,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:16,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:16,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541036557] [2021-07-09 18:31:16,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:16,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:16,771 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:18,715 INFO L93 Difference]: Finished difference Result 70246 states and 287846 transitions. [2021-07-09 18:31:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:31:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:19,152 INFO L225 Difference]: With dead ends: 70246 [2021-07-09 18:31:19,153 INFO L226 Difference]: Without dead ends: 70054 [2021-07-09 18:31:19,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 917.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:31:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70054 states. [2021-07-09 18:31:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70054 to 41773. [2021-07-09 18:31:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41773 states, 41772 states have (on average 4.147036292253184) internal successors, (173230), 41772 states have internal predecessors, (173230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41773 states to 41773 states and 173230 transitions. [2021-07-09 18:31:20,631 INFO L78 Accepts]: Start accepts. Automaton has 41773 states and 173230 transitions. Word has length 39 [2021-07-09 18:31:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:20,631 INFO L482 AbstractCegarLoop]: Abstraction has 41773 states and 173230 transitions. [2021-07-09 18:31:20,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 41773 states and 173230 transitions. [2021-07-09 18:31:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:20,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:20,730 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:20,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-09 18:31:20,932 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 101 times [2021-07-09 18:31:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:20,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798891230] [2021-07-09 18:31:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:21,322 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-07-09 18:31:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:21,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:21,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798891230] [2021-07-09 18:31:21,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798891230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:21,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220062255] [2021-07-09 18:31:21,423 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:21,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:31:21,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:31:21,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:21,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:21,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:21,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-09 18:31:21,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:31:21,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:21,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:31:21,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:54 [2021-07-09 18:31:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:21,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:21,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:21,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:21,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:21,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:31:21,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:27 [2021-07-09 18:31:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:22,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:22,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:31:22,003 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:22,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:22,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:22,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:31:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:22,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220062255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:22,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:22,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:31:22,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347872584] [2021-07-09 18:31:22,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:31:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:31:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:31:22,067 INFO L87 Difference]: Start difference. First operand 41773 states and 173230 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:26,243 INFO L93 Difference]: Finished difference Result 76909 states and 314617 transitions. [2021-07-09 18:31:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:31:26,243 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:26,548 INFO L225 Difference]: With dead ends: 76909 [2021-07-09 18:31:26,548 INFO L226 Difference]: Without dead ends: 76688 [2021-07-09 18:31:26,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 2783.5ms TimeCoverageRelationStatistics Valid=813, Invalid=4887, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:31:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76688 states. [2021-07-09 18:31:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76688 to 42250. [2021-07-09 18:31:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42250 states, 42249 states have (on average 4.141447134843428) internal successors, (174972), 42249 states have internal predecessors, (174972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42250 states to 42250 states and 174972 transitions. [2021-07-09 18:31:28,010 INFO L78 Accepts]: Start accepts. Automaton has 42250 states and 174972 transitions. Word has length 39 [2021-07-09 18:31:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:28,010 INFO L482 AbstractCegarLoop]: Abstraction has 42250 states and 174972 transitions. [2021-07-09 18:31:28,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 42250 states and 174972 transitions. [2021-07-09 18:31:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:28,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:28,103 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:28,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:28,303 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 102 times [2021-07-09 18:31:28,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:28,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410379464] [2021-07-09 18:31:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:28,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:28,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410379464] [2021-07-09 18:31:28,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410379464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:28,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359035897] [2021-07-09 18:31:28,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:28,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:31:28,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:31:28,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:28,928 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:31:29,129 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:31:29,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:29,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-09 18:31:29,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:29,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:29,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:29,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:31:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:29,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359035897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:29,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:29,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:29,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35804131] [2021-07-09 18:31:29,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:29,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:29,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:29,205 INFO L87 Difference]: Start difference. First operand 42250 states and 174972 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:31,307 INFO L93 Difference]: Finished difference Result 85820 states and 348935 transitions. [2021-07-09 18:31:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:31:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:31,663 INFO L225 Difference]: With dead ends: 85820 [2021-07-09 18:31:31,663 INFO L226 Difference]: Without dead ends: 85596 [2021-07-09 18:31:31,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1134.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:31:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85596 states. [2021-07-09 18:31:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85596 to 41959. [2021-07-09 18:31:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41959 states, 41958 states have (on average 4.145335812002479) internal successors, (173930), 41958 states have internal predecessors, (173930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41959 states to 41959 states and 173930 transitions. [2021-07-09 18:31:33,276 INFO L78 Accepts]: Start accepts. Automaton has 41959 states and 173930 transitions. Word has length 39 [2021-07-09 18:31:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:33,276 INFO L482 AbstractCegarLoop]: Abstraction has 41959 states and 173930 transitions. [2021-07-09 18:31:33,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 41959 states and 173930 transitions. [2021-07-09 18:31:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:33,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:33,374 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:33,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-09 18:31:33,583 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 103 times [2021-07-09 18:31:33,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:33,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211295536] [2021-07-09 18:31:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:34,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:34,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211295536] [2021-07-09 18:31:34,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211295536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:34,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898004758] [2021-07-09 18:31:34,074 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:34,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:34,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:31:34,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:34,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:34,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:34,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:31:34,336 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:34,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:31:34,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:34,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:34,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:34,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:31:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:34,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898004758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:34,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:34,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:34,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580970934] [2021-07-09 18:31:34,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:34,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:34,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:34,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:34,380 INFO L87 Difference]: Start difference. First operand 41959 states and 173930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:36,354 INFO L93 Difference]: Finished difference Result 87518 states and 356426 transitions. [2021-07-09 18:31:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:31:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:36,719 INFO L225 Difference]: With dead ends: 87518 [2021-07-09 18:31:36,719 INFO L226 Difference]: Without dead ends: 87366 [2021-07-09 18:31:36,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1187.6ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:31:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87366 states. [2021-07-09 18:31:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87366 to 42029. [2021-07-09 18:31:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42029 states, 42028 states have (on average 4.146045493480536) internal successors, (174250), 42028 states have internal predecessors, (174250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42029 states to 42029 states and 174250 transitions. [2021-07-09 18:31:38,407 INFO L78 Accepts]: Start accepts. Automaton has 42029 states and 174250 transitions. Word has length 39 [2021-07-09 18:31:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:38,408 INFO L482 AbstractCegarLoop]: Abstraction has 42029 states and 174250 transitions. [2021-07-09 18:31:38,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 42029 states and 174250 transitions. [2021-07-09 18:31:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:38,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:38,502 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:38,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-09 18:31:38,703 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:38,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:38,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 104 times [2021-07-09 18:31:38,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:38,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719779196] [2021-07-09 18:31:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:38,985 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-09 18:31:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:39,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:39,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719779196] [2021-07-09 18:31:39,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719779196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:39,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247020498] [2021-07-09 18:31:39,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:39,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:39,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:31:39,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:39,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:39,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:39,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:31:39,514 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:39,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:31:39,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:39,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:39,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:39,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:31:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:39,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247020498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:39,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:39,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:39,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641310052] [2021-07-09 18:31:39,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:39,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:39,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:39,557 INFO L87 Difference]: Start difference. First operand 42029 states and 174250 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:41,249 INFO L93 Difference]: Finished difference Result 73916 states and 302379 transitions. [2021-07-09 18:31:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:31:41,249 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:41,685 INFO L225 Difference]: With dead ends: 73916 [2021-07-09 18:31:41,685 INFO L226 Difference]: Without dead ends: 73826 [2021-07-09 18:31:41,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1246.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:31:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73826 states. [2021-07-09 18:31:43,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73826 to 41749. [2021-07-09 18:31:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-09 18:31:43,221 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-09 18:31:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:43,221 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-09 18:31:43,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-09 18:31:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:43,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:43,315 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:43,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 18:31:43,516 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2097565101, now seen corresponding path program 105 times [2021-07-09 18:31:43,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:43,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874935209] [2021-07-09 18:31:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:43,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:43,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874935209] [2021-07-09 18:31:43,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874935209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:43,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420066394] [2021-07-09 18:31:43,808 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:43,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:31:43,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:43,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:31:43,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:44,234 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-07-09 18:31:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:44,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:31:44,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-09 18:31:44,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-09 18:31:44,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:44,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:31:44,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-09 18:31:44,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:31:44,510 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:44,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:44,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:44,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-09 18:31:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:44,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420066394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:44,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:44,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:31:44,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556198241] [2021-07-09 18:31:44,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:31:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:31:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:31:44,671 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:49,504 INFO L93 Difference]: Finished difference Result 70259 states and 285004 transitions. [2021-07-09 18:31:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:31:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:49,779 INFO L225 Difference]: With dead ends: 70259 [2021-07-09 18:31:49,779 INFO L226 Difference]: Without dead ends: 70111 [2021-07-09 18:31:49,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 3914.1ms TimeCoverageRelationStatistics Valid=1005, Invalid=6651, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:31:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70111 states. [2021-07-09 18:31:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70111 to 42185. [2021-07-09 18:31:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42185 states, 42184 states have (on average 4.144130476009861) internal successors, (174816), 42184 states have internal predecessors, (174816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42185 states to 42185 states and 174816 transitions. [2021-07-09 18:31:51,242 INFO L78 Accepts]: Start accepts. Automaton has 42185 states and 174816 transitions. Word has length 39 [2021-07-09 18:31:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:51,242 INFO L482 AbstractCegarLoop]: Abstraction has 42185 states and 174816 transitions. [2021-07-09 18:31:51,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 42185 states and 174816 transitions. [2021-07-09 18:31:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:51,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:51,577 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:51,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:51,793 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 415728191, now seen corresponding path program 106 times [2021-07-09 18:31:51,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:51,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630386354] [2021-07-09 18:31:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:52,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630386354] [2021-07-09 18:31:52,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630386354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404737064] [2021-07-09 18:31:52,082 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:52,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:52,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:52,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:52,288 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:52,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:52,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:52,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-09 18:31:52,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:52,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:52,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:52,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:31:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:52,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404737064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:52,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:52,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:52,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439959566] [2021-07-09 18:31:52,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:52,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:52,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:52,391 INFO L87 Difference]: Start difference. First operand 42185 states and 174816 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:53,036 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-09 18:31:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:54,517 INFO L93 Difference]: Finished difference Result 85984 states and 350132 transitions. [2021-07-09 18:31:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:31:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:54,865 INFO L225 Difference]: With dead ends: 85984 [2021-07-09 18:31:54,865 INFO L226 Difference]: Without dead ends: 85768 [2021-07-09 18:31:54,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1264.9ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:31:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85768 states. [2021-07-09 18:31:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85768 to 41935. [2021-07-09 18:31:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41935 states, 41934 states have (on average 4.14837601945915) internal successors, (173958), 41934 states have internal predecessors, (173958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41935 states to 41935 states and 173958 transitions. [2021-07-09 18:31:56,648 INFO L78 Accepts]: Start accepts. Automaton has 41935 states and 173958 transitions. Word has length 39 [2021-07-09 18:31:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:56,648 INFO L482 AbstractCegarLoop]: Abstraction has 41935 states and 173958 transitions. [2021-07-09 18:31:56,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 41935 states and 173958 transitions. [2021-07-09 18:31:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:56,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:56,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:56,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-07-09 18:31:56,941 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash -385546579, now seen corresponding path program 107 times [2021-07-09 18:31:56,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:56,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476744683] [2021-07-09 18:31:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476744683] [2021-07-09 18:31:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476744683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410996323] [2021-07-09 18:31:57,183 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:57,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:31:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:31:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:57,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:57,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-09 18:31:57,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:31:57,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:57,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:31:57,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-07-09 18:31:57,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:57,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:31:57,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:57,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:57,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:57,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-07-09 18:31:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410996323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:57,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:57,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:31:57,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742115555] [2021-07-09 18:31:57,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:31:57,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:57,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:31:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:31:57,884 INFO L87 Difference]: Start difference. First operand 41935 states and 173958 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:00,630 INFO L93 Difference]: Finished difference Result 67534 states and 276182 transitions. [2021-07-09 18:32:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:32:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:00,881 INFO L225 Difference]: With dead ends: 67534 [2021-07-09 18:32:00,881 INFO L226 Difference]: Without dead ends: 67424 [2021-07-09 18:32:00,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1624.2ms TimeCoverageRelationStatistics Valid=420, Invalid=2772, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:32:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67424 states. [2021-07-09 18:32:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67424 to 42487. [2021-07-09 18:32:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42487 states, 42486 states have (on average 4.143011815656922) internal successors, (176020), 42486 states have internal predecessors, (176020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42487 states to 42487 states and 176020 transitions. [2021-07-09 18:32:02,287 INFO L78 Accepts]: Start accepts. Automaton has 42487 states and 176020 transitions. Word has length 39 [2021-07-09 18:32:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:02,287 INFO L482 AbstractCegarLoop]: Abstraction has 42487 states and 176020 transitions. [2021-07-09 18:32:02,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 42487 states and 176020 transitions. [2021-07-09 18:32:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:02,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:02,382 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:02,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:02,583 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1112077505, now seen corresponding path program 108 times [2021-07-09 18:32:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:02,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338559052] [2021-07-09 18:32:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:02,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:02,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338559052] [2021-07-09 18:32:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338559052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:02,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307380773] [2021-07-09 18:32:02,815 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:02,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:32:02,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:02,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:32:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:03,202 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:03,203 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:03,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:03,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:32:03,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:32:03,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:03,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:03,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:21 [2021-07-09 18:32:03,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:03,311 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:32:03,312 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:03,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:03,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:03,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:32:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:03,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307380773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:03,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:03,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:32:03,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277075226] [2021-07-09 18:32:03,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:32:03,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:03,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:32:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:32:03,359 INFO L87 Difference]: Start difference. First operand 42487 states and 176020 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:05,715 INFO L93 Difference]: Finished difference Result 95986 states and 392161 transitions. [2021-07-09 18:32:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:32:05,715 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:06,116 INFO L225 Difference]: With dead ends: 95986 [2021-07-09 18:32:06,116 INFO L226 Difference]: Without dead ends: 95876 [2021-07-09 18:32:06,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1549.3ms TimeCoverageRelationStatistics Valid=618, Invalid=2922, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:32:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95876 states. [2021-07-09 18:32:07,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95876 to 42654. [2021-07-09 18:32:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42654 states, 42653 states have (on average 4.144890160129417) internal successors, (176792), 42653 states have internal predecessors, (176792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42654 states to 42654 states and 176792 transitions. [2021-07-09 18:32:08,123 INFO L78 Accepts]: Start accepts. Automaton has 42654 states and 176792 transitions. Word has length 39 [2021-07-09 18:32:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:08,124 INFO L482 AbstractCegarLoop]: Abstraction has 42654 states and 176792 transitions. [2021-07-09 18:32:08,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42654 states and 176792 transitions. [2021-07-09 18:32:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:08,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:08,226 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:08,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-09 18:32:08,426 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:08,426 INFO L82 PathProgramCache]: Analyzing trace with hash 255965609, now seen corresponding path program 109 times [2021-07-09 18:32:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:08,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891795057] [2021-07-09 18:32:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:08,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891795057] [2021-07-09 18:32:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891795057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538590457] [2021-07-09 18:32:08,719 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:08,937 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:08,937 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:32:08,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:08,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:08,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:08,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-09 18:32:08,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:08,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:08,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:08,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:08,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:32:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:09,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538590457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:09,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:09,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:09,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162377666] [2021-07-09 18:32:09,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:09,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:09,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:09,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:09,018 INFO L87 Difference]: Start difference. First operand 42654 states and 176792 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:10,814 INFO L93 Difference]: Finished difference Result 72719 states and 297553 transitions. [2021-07-09 18:32:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:32:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:11,182 INFO L225 Difference]: With dead ends: 72719 [2021-07-09 18:32:11,182 INFO L226 Difference]: Without dead ends: 72471 [2021-07-09 18:32:11,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 935.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:32:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72471 states. [2021-07-09 18:32:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72471 to 42840. [2021-07-09 18:32:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42840 states, 42839 states have (on average 4.1432339690468964) internal successors, (177492), 42839 states have internal predecessors, (177492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42840 states to 42840 states and 177492 transitions. [2021-07-09 18:32:12,650 INFO L78 Accepts]: Start accepts. Automaton has 42840 states and 177492 transitions. Word has length 39 [2021-07-09 18:32:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:12,650 INFO L482 AbstractCegarLoop]: Abstraction has 42840 states and 177492 transitions. [2021-07-09 18:32:12,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 42840 states and 177492 transitions. [2021-07-09 18:32:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:12,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:12,745 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:12,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 18:32:12,951 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:12,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:12,951 INFO L82 PathProgramCache]: Analyzing trace with hash -381194881, now seen corresponding path program 110 times [2021-07-09 18:32:12,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:12,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240518816] [2021-07-09 18:32:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:13,215 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:32:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:13,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240518816] [2021-07-09 18:32:13,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240518816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:13,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046943820] [2021-07-09 18:32:13,450 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:13,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:13,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:13,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:13,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:32:13,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:13,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:13,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:13,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:32:13,711 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:13,712 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:32:13,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:13,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:13,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:13,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:32:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:13,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046943820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:13,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:13,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:13,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068085794] [2021-07-09 18:32:13,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:13,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:13,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:13,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:13,754 INFO L87 Difference]: Start difference. First operand 42840 states and 177492 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:15,653 INFO L93 Difference]: Finished difference Result 88928 states and 362147 transitions. [2021-07-09 18:32:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:32:15,654 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:16,015 INFO L225 Difference]: With dead ends: 88928 [2021-07-09 18:32:16,015 INFO L226 Difference]: Without dead ends: 88760 [2021-07-09 18:32:16,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1195.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:32:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88760 states. [2021-07-09 18:32:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88760 to 42910. [2021-07-09 18:32:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42910 states, 42909 states have (on average 4.143932508331585) internal successors, (177812), 42909 states have internal predecessors, (177812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42910 states to 42910 states and 177812 transitions. [2021-07-09 18:32:17,656 INFO L78 Accepts]: Start accepts. Automaton has 42910 states and 177812 transitions. Word has length 39 [2021-07-09 18:32:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:17,656 INFO L482 AbstractCegarLoop]: Abstraction has 42910 states and 177812 transitions. [2021-07-09 18:32:17,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 42910 states and 177812 transitions. [2021-07-09 18:32:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:17,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:17,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:18,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-07-09 18:32:18,205 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:18,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:18,205 INFO L82 PathProgramCache]: Analyzing trace with hash -177274135, now seen corresponding path program 111 times [2021-07-09 18:32:18,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:18,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576471511] [2021-07-09 18:32:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:18,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:18,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576471511] [2021-07-09 18:32:18,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576471511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:18,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048568973] [2021-07-09 18:32:18,495 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:18,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:32:18,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:18,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:32:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:18,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:18,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:32:18,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:18,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:18,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:18,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:72 [2021-07-09 18:32:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:18,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:18,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-07-09 18:32:18,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:18,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:32:18,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:18,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:18,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:32:18,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:18,950 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:32:18,950 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:32:18,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:19,039 INFO L628 ElimStorePlain]: treesize reduction 61, result has 69.8 percent of original size [2021-07-09 18:32:19,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:32:19,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:257, output treesize:187 [2021-07-09 18:32:19,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:19,192 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:32:19,194 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:19,460 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-09 18:32:19,461 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.7 percent of original size [2021-07-09 18:32:19,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:19,468 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:32:19,469 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:19,574 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 18:32:19,574 INFO L628 ElimStorePlain]: treesize reduction 10, result has 93.5 percent of original size [2021-07-09 18:32:19,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:19,581 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:32:19,583 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:19,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:19,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:32:19,646 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:183, output treesize:150 [2021-07-09 18:32:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:19,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048568973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:19,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:19,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:32:19,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043738819] [2021-07-09 18:32:19,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:32:19,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:19,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:32:19,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:32:19,890 INFO L87 Difference]: Start difference. First operand 42910 states and 177812 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:20,559 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-07-09 18:32:22,091 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-09 18:32:22,567 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2021-07-09 18:32:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:23,162 INFO L93 Difference]: Finished difference Result 68366 states and 278091 transitions. [2021-07-09 18:32:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:32:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:23,578 INFO L225 Difference]: With dead ends: 68366 [2021-07-09 18:32:23,578 INFO L226 Difference]: Without dead ends: 68218 [2021-07-09 18:32:23,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2415.7ms TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:32:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68218 states. [2021-07-09 18:32:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68218 to 42932. [2021-07-09 18:32:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42932 states, 42931 states have (on average 4.143765577321749) internal successors, (177896), 42931 states have internal predecessors, (177896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42932 states to 42932 states and 177896 transitions. [2021-07-09 18:32:25,019 INFO L78 Accepts]: Start accepts. Automaton has 42932 states and 177896 transitions. Word has length 39 [2021-07-09 18:32:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:25,019 INFO L482 AbstractCegarLoop]: Abstraction has 42932 states and 177896 transitions. [2021-07-09 18:32:25,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 42932 states and 177896 transitions. [2021-07-09 18:32:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:25,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:25,122 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:25,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:25,322 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:25,322 INFO L82 PathProgramCache]: Analyzing trace with hash -655100993, now seen corresponding path program 112 times [2021-07-09 18:32:25,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:25,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799854974] [2021-07-09 18:32:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:25,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799854974] [2021-07-09 18:32:25,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799854974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:25,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893678472] [2021-07-09 18:32:25,599 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:25,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:25,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:25,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:25,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:32:25,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:25,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:32:25,852 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:25,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:32:25,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:25,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:25,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:32:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:25,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893678472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:25,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:25,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:25,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454197879] [2021-07-09 18:32:25,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:25,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:25,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:25,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:25,894 INFO L87 Difference]: Start difference. First operand 42932 states and 177896 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:27,930 INFO L93 Difference]: Finished difference Result 89444 states and 364653 transitions. [2021-07-09 18:32:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:32:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:28,458 INFO L225 Difference]: With dead ends: 89444 [2021-07-09 18:32:28,459 INFO L226 Difference]: Without dead ends: 89362 [2021-07-09 18:32:28,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1152.5ms TimeCoverageRelationStatistics Valid=332, Invalid=1738, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:32:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89362 states. [2021-07-09 18:32:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89362 to 42654. [2021-07-09 18:32:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42654 states, 42653 states have (on average 4.144890160129417) internal successors, (176792), 42653 states have internal predecessors, (176792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42654 states to 42654 states and 176792 transitions. [2021-07-09 18:32:30,080 INFO L78 Accepts]: Start accepts. Automaton has 42654 states and 176792 transitions. Word has length 39 [2021-07-09 18:32:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:30,080 INFO L482 AbstractCegarLoop]: Abstraction has 42654 states and 176792 transitions. [2021-07-09 18:32:30,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 42654 states and 176792 transitions. [2021-07-09 18:32:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:30,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:30,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:30,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-07-09 18:32:30,375 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash -886720207, now seen corresponding path program 113 times [2021-07-09 18:32:30,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:30,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073954358] [2021-07-09 18:32:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:30,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073954358] [2021-07-09 18:32:30,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073954358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627758369] [2021-07-09 18:32:30,632 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:30,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:32:30,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:30,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:32:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:31,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:32:31,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:31,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:31,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:95 [2021-07-09 18:32:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-07-09 18:32:31,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:32:31,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-07-09 18:32:31,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:32:31,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:32:31,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:31,317 INFO L628 ElimStorePlain]: treesize reduction 7, result has 91.4 percent of original size [2021-07-09 18:32:31,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:32:31,320 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:136, output treesize:69 [2021-07-09 18:32:31,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:32:31,425 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:31,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:31,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:32:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:31,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627758369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:31,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:31,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:32:31,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975322977] [2021-07-09 18:32:31,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:32:31,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:31,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:32:31,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:32:31,481 INFO L87 Difference]: Start difference. First operand 42654 states and 176792 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:34,426 INFO L93 Difference]: Finished difference Result 72106 states and 295021 transitions. [2021-07-09 18:32:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:32:34,427 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:34,706 INFO L225 Difference]: With dead ends: 72106 [2021-07-09 18:32:34,706 INFO L226 Difference]: Without dead ends: 71996 [2021-07-09 18:32:34,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2003.8ms TimeCoverageRelationStatistics Valid=599, Invalid=3561, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:32:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71996 states. [2021-07-09 18:32:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71996 to 42878. [2021-07-09 18:32:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.144296475966136) internal successors, (177695), 42877 states have internal predecessors, (177695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 177695 transitions. [2021-07-09 18:32:36,347 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 177695 transitions. Word has length 39 [2021-07-09 18:32:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:36,347 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 177695 transitions. [2021-07-09 18:32:36,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 177695 transitions. [2021-07-09 18:32:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:36,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:36,453 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:36,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:36,654 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1729406393, now seen corresponding path program 114 times [2021-07-09 18:32:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:36,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542611615] [2021-07-09 18:32:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:36,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:36,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542611615] [2021-07-09 18:32:36,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542611615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:36,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150023608] [2021-07-09 18:32:36,927 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:36,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:32:36,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:32:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:37,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 18:32:37,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:37,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-07-09 18:32:37,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:32:37,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:37,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:12 [2021-07-09 18:32:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:37,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150023608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:37,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:37,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881395711] [2021-07-09 18:32:37,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:37,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:37,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:37,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:37,268 INFO L87 Difference]: Start difference. First operand 42878 states and 177695 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:39,370 INFO L93 Difference]: Finished difference Result 93481 states and 381991 transitions. [2021-07-09 18:32:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:32:39,370 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:39,928 INFO L225 Difference]: With dead ends: 93481 [2021-07-09 18:32:39,928 INFO L226 Difference]: Without dead ends: 93426 [2021-07-09 18:32:39,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1039.1ms TimeCoverageRelationStatistics Valid=377, Invalid=1879, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:32:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93426 states. [2021-07-09 18:32:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93426 to 43171. [2021-07-09 18:32:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43171 states, 43170 states have (on average 4.145564049108177) internal successors, (178964), 43170 states have internal predecessors, (178964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43171 states to 43171 states and 178964 transitions. [2021-07-09 18:32:41,588 INFO L78 Accepts]: Start accepts. Automaton has 43171 states and 178964 transitions. Word has length 39 [2021-07-09 18:32:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:41,588 INFO L482 AbstractCegarLoop]: Abstraction has 43171 states and 178964 transitions. [2021-07-09 18:32:41,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 43171 states and 178964 transitions. [2021-07-09 18:32:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:41,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:41,682 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:41,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:41,883 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 470021165, now seen corresponding path program 115 times [2021-07-09 18:32:41,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:41,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274709586] [2021-07-09 18:32:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:42,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:42,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274709586] [2021-07-09 18:32:42,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274709586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:42,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731305627] [2021-07-09 18:32:42,107 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:42,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:42,369 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:32:42,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:32:42,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:42,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:42,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:42,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:32:42,598 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:42,598 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:32:42,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:42,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:42,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:42,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:32:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:42,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731305627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:42,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:42,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:42,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731856247] [2021-07-09 18:32:42,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:42,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:42,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:42,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:42,639 INFO L87 Difference]: Start difference. First operand 43171 states and 178964 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:44,027 INFO L93 Difference]: Finished difference Result 78544 states and 323065 transitions. [2021-07-09 18:32:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:32:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:44,487 INFO L225 Difference]: With dead ends: 78544 [2021-07-09 18:32:44,487 INFO L226 Difference]: Without dead ends: 78489 [2021-07-09 18:32:44,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 713.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:32:44,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78489 states. [2021-07-09 18:32:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78489 to 43683. [2021-07-09 18:32:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43683 states, 43682 states have (on average 4.147474932466462) internal successors, (181170), 43682 states have internal predecessors, (181170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43683 states to 43683 states and 181170 transitions. [2021-07-09 18:32:46,005 INFO L78 Accepts]: Start accepts. Automaton has 43683 states and 181170 transitions. Word has length 39 [2021-07-09 18:32:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:46,005 INFO L482 AbstractCegarLoop]: Abstraction has 43683 states and 181170 transitions. [2021-07-09 18:32:46,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 43683 states and 181170 transitions. [2021-07-09 18:32:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:46,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:46,101 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:46,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:46,301 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1959373289, now seen corresponding path program 116 times [2021-07-09 18:32:46,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:46,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918023377] [2021-07-09 18:32:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:46,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918023377] [2021-07-09 18:32:46,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918023377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172556549] [2021-07-09 18:32:46,532 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:46,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:46,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:32:46,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:32:46,779 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:32:46,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:46,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:46,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:32:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:46,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172556549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:46,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:46,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:46,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579670739] [2021-07-09 18:32:46,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:46,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:46,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:46,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:46,820 INFO L87 Difference]: Start difference. First operand 43683 states and 181170 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:48,520 INFO L93 Difference]: Finished difference Result 77744 states and 319860 transitions. [2021-07-09 18:32:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:32:48,520 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:48,832 INFO L225 Difference]: With dead ends: 77744 [2021-07-09 18:32:48,832 INFO L226 Difference]: Without dead ends: 77689 [2021-07-09 18:32:48,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:32:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77689 states. [2021-07-09 18:32:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77689 to 42799. [2021-07-09 18:32:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42799 states, 42798 states have (on average 4.1445861956166175) internal successors, (177380), 42798 states have internal predecessors, (177380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42799 states to 42799 states and 177380 transitions. [2021-07-09 18:32:50,565 INFO L78 Accepts]: Start accepts. Automaton has 42799 states and 177380 transitions. Word has length 39 [2021-07-09 18:32:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:50,565 INFO L482 AbstractCegarLoop]: Abstraction has 42799 states and 177380 transitions. [2021-07-09 18:32:50,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 42799 states and 177380 transitions. [2021-07-09 18:32:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:50,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:50,676 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:50,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-07-09 18:32:50,877 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1581231163, now seen corresponding path program 117 times [2021-07-09 18:32:50,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:50,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063690206] [2021-07-09 18:32:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:51,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:51,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063690206] [2021-07-09 18:32:51,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063690206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:51,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407348668] [2021-07-09 18:32:51,171 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:51,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:51,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:51,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:32:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:51,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:51,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:51,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:32:51,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:51,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:51,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:51,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-07-09 18:32:51,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:51,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:51,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:51,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:51,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:32:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407348668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:51,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:51,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:32:51,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455345800] [2021-07-09 18:32:51,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:32:51,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:51,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:32:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:32:51,552 INFO L87 Difference]: Start difference. First operand 42799 states and 177380 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:53,726 INFO L93 Difference]: Finished difference Result 71861 states and 293569 transitions. [2021-07-09 18:32:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:32:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:53,997 INFO L225 Difference]: With dead ends: 71861 [2021-07-09 18:32:53,997 INFO L226 Difference]: Without dead ends: 71733 [2021-07-09 18:32:53,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1236.6ms TimeCoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:32:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71733 states. [2021-07-09 18:32:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71733 to 43202. [2021-07-09 18:32:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43202 states, 43201 states have (on average 4.14057544964237) internal successors, (178877), 43201 states have internal predecessors, (178877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43202 states to 43202 states and 178877 transitions. [2021-07-09 18:32:55,466 INFO L78 Accepts]: Start accepts. Automaton has 43202 states and 178877 transitions. Word has length 39 [2021-07-09 18:32:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:55,466 INFO L482 AbstractCegarLoop]: Abstraction has 43202 states and 178877 transitions. [2021-07-09 18:32:55,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 43202 states and 178877 transitions. [2021-07-09 18:32:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:55,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:55,770 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:55,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-09 18:32:55,987 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:55,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1347313599, now seen corresponding path program 118 times [2021-07-09 18:32:55,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:55,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564301246] [2021-07-09 18:32:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:56,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:56,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564301246] [2021-07-09 18:32:56,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564301246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:56,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902865071] [2021-07-09 18:32:56,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:56,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:56,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:56,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:56,438 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:56,438 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:56,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:56,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:56,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:56,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:32:56,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:56,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:56,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:56,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:56,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:32:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:56,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902865071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:56,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:56,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:56,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785630227] [2021-07-09 18:32:56,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:56,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:56,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:56,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:56,564 INFO L87 Difference]: Start difference. First operand 43202 states and 178877 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:58,787 INFO L93 Difference]: Finished difference Result 75105 states and 307226 transitions. [2021-07-09 18:32:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:32:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:59,067 INFO L225 Difference]: With dead ends: 75105 [2021-07-09 18:32:59,067 INFO L226 Difference]: Without dead ends: 74889 [2021-07-09 18:32:59,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1141.9ms TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:32:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74889 states. [2021-07-09 18:33:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74889 to 43264. [2021-07-09 18:33:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43264 states, 43263 states have (on average 4.141668400249636) internal successors, (179181), 43263 states have internal predecessors, (179181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43264 states to 43264 states and 179181 transitions. [2021-07-09 18:33:00,794 INFO L78 Accepts]: Start accepts. Automaton has 43264 states and 179181 transitions. Word has length 39 [2021-07-09 18:33:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:00,794 INFO L482 AbstractCegarLoop]: Abstraction has 43264 states and 179181 transitions. [2021-07-09 18:33:00,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 43264 states and 179181 transitions. [2021-07-09 18:33:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:00,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:00,921 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:01,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:01,123 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1135798081, now seen corresponding path program 119 times [2021-07-09 18:33:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:01,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069147830] [2021-07-09 18:33:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:01,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069147830] [2021-07-09 18:33:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069147830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552035854] [2021-07-09 18:33:01,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:01,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:33:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:33:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:01,622 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:33:01,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:01,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:01,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-07-09 18:33:01,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:01,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:01,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:33:01,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:01,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-07-09 18:33:01,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:01,776 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 11 treesize of output 5 [2021-07-09 18:33:01,777 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:33:01,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:01,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:01,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-07-09 18:33:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:01,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552035854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:01,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:01,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:33:01,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645074895] [2021-07-09 18:33:01,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:33:01,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:33:01,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:33:01,802 INFO L87 Difference]: Start difference. First operand 43264 states and 179181 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:04,721 INFO L93 Difference]: Finished difference Result 69582 states and 284361 transitions. [2021-07-09 18:33:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:33:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted.