/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/send-receive.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:08:24,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:08:24,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:08:25,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 20:08:25,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 20:08:25,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 20:08:25,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 20:08:25,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 20:08:25,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 20:08:25,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 20:08:25,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 20:08:25,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 20:08:25,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:08:25,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:08:25,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:08:25,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:08:25,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:08:25,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:08:25,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:08:25,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:08:25,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:08:25,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:08:25,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:08:25,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:08:25,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 20:08:25,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 20:08:25,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 20:08:25,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 20:08:25,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 20:08:25,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 20:08:25,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 20:08:25,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 20:08:25,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 20:08:25,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 20:08:25,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 20:08:25,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 20:08:25,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 20:08:25,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 20:08:25,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:08:25,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:08:25,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:08:25,100 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 [2021-07-13 20:08:25,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:08:25,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:08:25,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:08:25,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:08:25,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:08:25,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:08:25,138 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:08:25,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:08:25,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:08:25,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:08:25,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:08:25,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:08:25,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:08:25,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:08:25,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:08:25,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:08:25,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:08:25,141 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:08:25,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:08:25,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:08:25,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:08:25,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:08:25,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:08:25,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:08:25,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:08:25,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:08:25,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:08:25,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:08:25,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:08:25,142 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:08:25,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:08:25,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:08:25,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:08:25,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:08:25,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:08:25,499 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:08:25,502 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:08:25,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl [2021-07-13 20:08:25,503 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl' [2021-07-13 20:08:25,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:08:25,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:08:25,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:08:25,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:08:25,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:08:25,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:08:25,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:08:25,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:08:25,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:08:25,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/1) ... [2021-07-13 20:08:25,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:08:25,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:08:25,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:08:25,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:08:25,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (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 [2021-07-13 20:08:25,647 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:08:25,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:08:25,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:08:25,647 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:08:25,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:08:25,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:08:25,648 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:08:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:08:25,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:08:25,648 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:08:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:08:25,648 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:08:25,649 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:08:25,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:08:25,902 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:08:25,904 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:08:25 BoogieIcfgContainer [2021-07-13 20:08:25,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:08:25,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:08:25,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:08:25,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:08:25,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:08:25" (1/2) ... [2021-07-13 20:08:25,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25413118 and model type send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:08:25, skipping insertion in model container [2021-07-13 20:08:25,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:08:25" (2/2) ... [2021-07-13 20:08:25,910 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive.wvr.bpl [2021-07-13 20:08:25,932 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:08:25,932 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:08:25,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:08:25,933 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:08:25,967 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:08:25,986 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:08:26,002 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:08:26,002 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:08:26,002 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:08:26,002 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:08:26,002 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:08:26,002 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:08:26,003 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:08:26,003 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:08:26,010 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 30 transitions, 84 flow [2021-07-13 20:08:26,073 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 147 states, 146 states have (on average 2.76027397260274) internal successors, (403), 146 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 146 states have (on average 2.76027397260274) internal successors, (403), 146 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:08:26,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:26,099 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:26,099 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051581, now seen corresponding path program 1 times [2021-07-13 20:08:26,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:26,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488038708] [2021-07-13 20:08:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:26,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:26,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488038708] [2021-07-13 20:08:26,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488038708] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:08:26,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:08:26,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:08:26,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925726918] [2021-07-13 20:08:26,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:08:26,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:26,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:08:26,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:08:26,281 INFO L87 Difference]: Start difference. First operand has 147 states, 146 states have (on average 2.76027397260274) internal successors, (403), 146 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:26,345 INFO L93 Difference]: Finished difference Result 159 states and 404 transitions. [2021-07-13 20:08:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:08:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 20:08:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:26,356 INFO L225 Difference]: With dead ends: 159 [2021-07-13 20:08:26,356 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 20:08:26,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:08:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 20:08:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-07-13 20:08:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.39) internal successors, (239), 100 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 239 transitions. [2021-07-13 20:08:26,403 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 239 transitions. Word has length 17 [2021-07-13 20:08:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:26,403 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 239 transitions. [2021-07-13 20:08:26,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 239 transitions. [2021-07-13 20:08:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:08:26,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:26,405 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:26,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:08:26,406 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1722493283, now seen corresponding path program 2 times [2021-07-13 20:08:26,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:26,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768807970] [2021-07-13 20:08:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:26,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:26,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768807970] [2021-07-13 20:08:26,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768807970] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:08:26,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:08:26,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:08:26,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211234032] [2021-07-13 20:08:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:08:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:26,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:08:26,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:08:26,457 INFO L87 Difference]: Start difference. First operand 101 states and 239 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:26,493 INFO L93 Difference]: Finished difference Result 153 states and 362 transitions. [2021-07-13 20:08:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:08:26,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 20:08:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:26,495 INFO L225 Difference]: With dead ends: 153 [2021-07-13 20:08:26,495 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 20:08:26,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:08:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 20:08:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-07-13 20:08:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.4344262295081966) internal successors, (297), 122 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2021-07-13 20:08:26,509 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 17 [2021-07-13 20:08:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:26,510 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2021-07-13 20:08:26,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2021-07-13 20:08:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:08:26,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:26,511 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:26,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:08:26,512 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1424318111, now seen corresponding path program 1 times [2021-07-13 20:08:26,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:26,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879995733] [2021-07-13 20:08:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:26,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879995733] [2021-07-13 20:08:26,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879995733] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:08:26,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:08:26,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:08:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265751517] [2021-07-13 20:08:26,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:08:26,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:08:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:08:26,559 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. 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) [2021-07-13 20:08:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:26,574 INFO L93 Difference]: Finished difference Result 137 states and 328 transitions. [2021-07-13 20:08:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:08:26,578 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 [2021-07-13 20:08:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:26,580 INFO L225 Difference]: With dead ends: 137 [2021-07-13 20:08:26,580 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 20:08:26,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:08:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 20:08:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-07-13 20:08:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.411764705882353) internal successors, (328), 136 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2021-07-13 20:08:26,593 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 19 [2021-07-13 20:08:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:26,593 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2021-07-13 20:08:26,593 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) [2021-07-13 20:08:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2021-07-13 20:08:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:08:26,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:26,595 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] [2021-07-13 20:08:26,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:08:26,595 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1463492541, now seen corresponding path program 1 times [2021-07-13 20:08:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:26,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880131939] [2021-07-13 20:08:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:26,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:26,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880131939] [2021-07-13 20:08:26,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880131939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:26,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796948235] [2021-07-13 20:08:26,711 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 [2021-07-13 20:08:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:08:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:26,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:08:26,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:26,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:26,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:26,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-07-13 20:08:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:26,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796948235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:26,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:26,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:08:26,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485017702] [2021-07-13 20:08:26,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:08:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:08:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:08:26,997 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:27,066 INFO L93 Difference]: Finished difference Result 207 states and 501 transitions. [2021-07-13 20:08:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:08:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:08:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:27,068 INFO L225 Difference]: With dead ends: 207 [2021-07-13 20:08:27,069 INFO L226 Difference]: Without dead ends: 177 [2021-07-13 20:08:27,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:08:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-07-13 20:08:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-07-13 20:08:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.448717948717949) internal successors, (382), 156 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 382 transitions. [2021-07-13 20:08:27,089 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 382 transitions. Word has length 23 [2021-07-13 20:08:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:27,089 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 382 transitions. [2021-07-13 20:08:27,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 382 transitions. [2021-07-13 20:08:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:08:27,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:27,091 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] [2021-07-13 20:08:27,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:27,317 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2032513123, now seen corresponding path program 1 times [2021-07-13 20:08:27,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:27,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192018629] [2021-07-13 20:08:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:27,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192018629] [2021-07-13 20:08:27,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192018629] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:08:27,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:08:27,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:08:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241877889] [2021-07-13 20:08:27,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:08:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:08:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:08:27,340 INFO L87 Difference]: Start difference. First operand 157 states and 382 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:27,348 INFO L93 Difference]: Finished difference Result 175 states and 425 transitions. [2021-07-13 20:08:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:08:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:08:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:27,350 INFO L225 Difference]: With dead ends: 175 [2021-07-13 20:08:27,350 INFO L226 Difference]: Without dead ends: 175 [2021-07-13 20:08:27,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:08:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-13 20:08:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2021-07-13 20:08:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4342105263157894) internal successors, (370), 152 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 370 transitions. [2021-07-13 20:08:27,361 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 370 transitions. Word has length 23 [2021-07-13 20:08:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:27,362 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 370 transitions. [2021-07-13 20:08:27,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 370 transitions. [2021-07-13 20:08:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:27,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:27,364 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] [2021-07-13 20:08:27,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:08:27,364 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash 113936453, now seen corresponding path program 2 times [2021-07-13 20:08:27,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:27,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627341023] [2021-07-13 20:08:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:27,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627341023] [2021-07-13 20:08:27,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627341023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238576258] [2021-07-13 20:08:27,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:27,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:27,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:27,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:08:27,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238576258] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:08:27,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:08:27,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-07-13 20:08:27,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232678226] [2021-07-13 20:08:27,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:08:27,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:08:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:08:27,529 INFO L87 Difference]: Start difference. First operand 153 states and 370 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) [2021-07-13 20:08:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:27,543 INFO L93 Difference]: Finished difference Result 401 states and 958 transitions. [2021-07-13 20:08:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:08:27,545 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 25 [2021-07-13 20:08:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:27,547 INFO L225 Difference]: With dead ends: 401 [2021-07-13 20:08:27,547 INFO L226 Difference]: Without dead ends: 393 [2021-07-13 20:08:27,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:08:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-13 20:08:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 259. [2021-07-13 20:08:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.5155038759689923) internal successors, (649), 258 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 649 transitions. [2021-07-13 20:08:27,567 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 649 transitions. Word has length 25 [2021-07-13 20:08:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:27,567 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 649 transitions. [2021-07-13 20:08:27,567 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) [2021-07-13 20:08:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 649 transitions. [2021-07-13 20:08:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:08:27,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:27,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:27,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:27,789 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash -432740959, now seen corresponding path program 3 times [2021-07-13 20:08:27,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:27,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566206552] [2021-07-13 20:08:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:27,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566206552] [2021-07-13 20:08:27,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566206552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558892850] [2021-07-13 20:08:27,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:27,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:08:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:08:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558892850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:27,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:08:27,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982939579] [2021-07-13 20:08:27,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:08:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:08:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:08:27,946 INFO L87 Difference]: Start difference. First operand 259 states and 649 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:27,970 INFO L93 Difference]: Finished difference Result 363 states and 850 transitions. [2021-07-13 20:08:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:08:27,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:08:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:27,974 INFO L225 Difference]: With dead ends: 363 [2021-07-13 20:08:27,974 INFO L226 Difference]: Without dead ends: 363 [2021-07-13 20:08:27,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:08:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-13 20:08:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 319. [2021-07-13 20:08:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.39937106918239) internal successors, (763), 318 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 763 transitions. [2021-07-13 20:08:28,000 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 763 transitions. Word has length 29 [2021-07-13 20:08:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:28,000 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 763 transitions. [2021-07-13 20:08:28,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 763 transitions. [2021-07-13 20:08:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:08:28,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:28,002 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:28,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:28,203 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:28,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1231702591, now seen corresponding path program 1 times [2021-07-13 20:08:28,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:28,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260902439] [2021-07-13 20:08:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:28,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:28,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260902439] [2021-07-13 20:08:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260902439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461908849] [2021-07-13 20:08:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:08:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:08:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:28,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:28,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:28,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:08:28,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:28,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:28,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:28,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-07-13 20:08:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:28,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461908849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:28,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:28,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:08:28,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643927224] [2021-07-13 20:08:28,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:08:28,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:28,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:08:28,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:08:28,621 INFO L87 Difference]: Start difference. First operand 319 states and 763 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:28,774 INFO L93 Difference]: Finished difference Result 455 states and 1091 transitions. [2021-07-13 20:08:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:08:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:08:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:28,777 INFO L225 Difference]: With dead ends: 455 [2021-07-13 20:08:28,777 INFO L226 Difference]: Without dead ends: 415 [2021-07-13 20:08:28,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:08:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-13 20:08:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 351. [2021-07-13 20:08:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.3857142857142857) internal successors, (835), 350 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 835 transitions. [2021-07-13 20:08:28,797 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 835 transitions. Word has length 29 [2021-07-13 20:08:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:28,798 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 835 transitions. [2021-07-13 20:08:28,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 835 transitions. [2021-07-13 20:08:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:08:28,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:28,799 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:29,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:29,021 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1556600769, now seen corresponding path program 2 times [2021-07-13 20:08:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:29,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143187335] [2021-07-13 20:08:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:29,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:29,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143187335] [2021-07-13 20:08:29,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143187335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578385073] [2021-07-13 20:08:29,137 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 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 [2021-07-13 20:08:29,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:29,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:29,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:08:29,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:29,290 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:08:29,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:29,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:29,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-07-13 20:08:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578385073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:29,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 20:08:29,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224166747] [2021-07-13 20:08:29,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:08:29,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:29,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:08:29,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:08:29,321 INFO L87 Difference]: Start difference. First operand 351 states and 835 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:29,473 INFO L93 Difference]: Finished difference Result 483 states and 1151 transitions. [2021-07-13 20:08:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:08:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:08:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:29,476 INFO L225 Difference]: With dead ends: 483 [2021-07-13 20:08:29,476 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 20:08:29,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:08:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 20:08:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 383. [2021-07-13 20:08:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.3952879581151834) internal successors, (915), 382 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 915 transitions. [2021-07-13 20:08:29,489 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 915 transitions. Word has length 29 [2021-07-13 20:08:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:29,489 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 915 transitions. [2021-07-13 20:08:29,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 915 transitions. [2021-07-13 20:08:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:08:29,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:29,491 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:29,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:29,705 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:29,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:29,705 INFO L82 PathProgramCache]: Analyzing trace with hash -974284733, now seen corresponding path program 3 times [2021-07-13 20:08:29,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:29,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324975239] [2021-07-13 20:08:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:29,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:29,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324975239] [2021-07-13 20:08:29,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324975239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046126354] [2021-07-13 20:08:29,749 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 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 [2021-07-13 20:08:29,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:08:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:08:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:29,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046126354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:29,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:29,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:08:29,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167340759] [2021-07-13 20:08:29,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:08:29,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:29,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:08:29,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:08:29,870 INFO L87 Difference]: Start difference. First operand 383 states and 915 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:29,895 INFO L93 Difference]: Finished difference Result 827 states and 1940 transitions. [2021-07-13 20:08:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:08:29,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:08:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:29,900 INFO L225 Difference]: With dead ends: 827 [2021-07-13 20:08:29,900 INFO L226 Difference]: Without dead ends: 819 [2021-07-13 20:08:29,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:08:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-07-13 20:08:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 463. [2021-07-13 20:08:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.448051948051948) internal successors, (1131), 462 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1131 transitions. [2021-07-13 20:08:29,914 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1131 transitions. Word has length 31 [2021-07-13 20:08:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:29,915 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1131 transitions. [2021-07-13 20:08:29,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1131 transitions. [2021-07-13 20:08:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:29,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:29,918 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:30,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:30,143 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash -257743713, now seen corresponding path program 4 times [2021-07-13 20:08:30,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:30,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245338398] [2021-07-13 20:08:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:30,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:30,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245338398] [2021-07-13 20:08:30,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245338398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:30,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441758682] [2021-07-13 20:08:30,395 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 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 [2021-07-13 20:08:30,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:30,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:08:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:30,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:30,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:30,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-13 20:08:30,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:30,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:30,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:30,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:08:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:30,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441758682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:30,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:30,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:08:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004658301] [2021-07-13 20:08:30,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:08:30,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:08:30,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:08:30,671 INFO L87 Difference]: Start difference. First operand 463 states and 1131 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:31,002 INFO L93 Difference]: Finished difference Result 851 states and 2063 transitions. [2021-07-13 20:08:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:08:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:31,006 INFO L225 Difference]: With dead ends: 851 [2021-07-13 20:08:31,006 INFO L226 Difference]: Without dead ends: 735 [2021-07-13 20:08:31,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:08:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-07-13 20:08:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 591. [2021-07-13 20:08:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.4322033898305087) internal successors, (1435), 590 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1435 transitions. [2021-07-13 20:08:31,023 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1435 transitions. Word has length 35 [2021-07-13 20:08:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:31,023 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1435 transitions. [2021-07-13 20:08:31,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1435 transitions. [2021-07-13 20:08:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:31,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:31,025 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:31,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:31,241 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash 734580383, now seen corresponding path program 5 times [2021-07-13 20:08:31,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:31,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630469750] [2021-07-13 20:08:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:31,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630469750] [2021-07-13 20:08:31,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630469750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76061555] [2021-07-13 20:08:31,460 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 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 [2021-07-13 20:08:31,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:08:31,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:31,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:08:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-13 20:08:31,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:31,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:08:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76061555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:31,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:08:31,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982271809] [2021-07-13 20:08:31,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:08:31,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:31,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:08:31,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:08:31,754 INFO L87 Difference]: Start difference. First operand 591 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:32,017 INFO L93 Difference]: Finished difference Result 1023 states and 2527 transitions. [2021-07-13 20:08:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:08:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:32,022 INFO L225 Difference]: With dead ends: 1023 [2021-07-13 20:08:32,023 INFO L226 Difference]: Without dead ends: 959 [2021-07-13 20:08:32,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:08:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-07-13 20:08:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 607. [2021-07-13 20:08:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.433993399339934) internal successors, (1475), 606 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1475 transitions. [2021-07-13 20:08:32,041 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1475 transitions. Word has length 35 [2021-07-13 20:08:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:32,041 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1475 transitions. [2021-07-13 20:08:32,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1475 transitions. [2021-07-13 20:08:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:32,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:32,043 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:32,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:08:32,268 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1026803359, now seen corresponding path program 6 times [2021-07-13 20:08:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:32,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901953845] [2021-07-13 20:08:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:32,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:32,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901953845] [2021-07-13 20:08:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901953845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:32,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577538208] [2021-07-13 20:08:32,438 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 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 [2021-07-13 20:08:32,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:08:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:32,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:08:32,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:32,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:32,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:32,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-13 20:08:32,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:32,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:32,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:32,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:08:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:32,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577538208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:32,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:32,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:08:32,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364476675] [2021-07-13 20:08:32,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:08:32,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:32,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:08:32,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:08:32,715 INFO L87 Difference]: Start difference. First operand 607 states and 1475 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-07-13 20:08:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:33,132 INFO L93 Difference]: Finished difference Result 1319 states and 3177 transitions. [2021-07-13 20:08:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:08:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 35 [2021-07-13 20:08:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:33,138 INFO L225 Difference]: With dead ends: 1319 [2021-07-13 20:08:33,138 INFO L226 Difference]: Without dead ends: 1103 [2021-07-13 20:08:33,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-07-13 20:08:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 671. [2021-07-13 20:08:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.428358208955224) internal successors, (1627), 670 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1627 transitions. [2021-07-13 20:08:33,166 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1627 transitions. Word has length 35 [2021-07-13 20:08:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:33,166 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1627 transitions. [2021-07-13 20:08:33,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-07-13 20:08:33,166 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1627 transitions. [2021-07-13 20:08:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:33,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:33,168 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:33,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:33,381 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:33,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2019127455, now seen corresponding path program 7 times [2021-07-13 20:08:33,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:33,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770909896] [2021-07-13 20:08:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:33,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770909896] [2021-07-13 20:08:33,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770909896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838183168] [2021-07-13 20:08:33,559 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 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 [2021-07-13 20:08:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:08:33,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:33,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-13 20:08:33,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:33,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-13 20:08:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838183168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:33,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:08:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137199838] [2021-07-13 20:08:33,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:08:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:08:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:08:33,790 INFO L87 Difference]: Start difference. First operand 671 states and 1627 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-07-13 20:08:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:34,148 INFO L93 Difference]: Finished difference Result 1239 states and 3075 transitions. [2021-07-13 20:08:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:08:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 35 [2021-07-13 20:08:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:34,155 INFO L225 Difference]: With dead ends: 1239 [2021-07-13 20:08:34,155 INFO L226 Difference]: Without dead ends: 1151 [2021-07-13 20:08:34,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:08:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-07-13 20:08:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 543. [2021-07-13 20:08:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.440959409594096) internal successors, (1323), 542 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1323 transitions. [2021-07-13 20:08:34,176 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1323 transitions. Word has length 35 [2021-07-13 20:08:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:34,176 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1323 transitions. [2021-07-13 20:08:34,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-07-13 20:08:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1323 transitions. [2021-07-13 20:08:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:34,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:34,203 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:34,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:34,417 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2135123297, now seen corresponding path program 8 times [2021-07-13 20:08:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:34,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120090017] [2021-07-13 20:08:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:34,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:34,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120090017] [2021-07-13 20:08:34,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120090017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:34,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12587285] [2021-07-13 20:08:34,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:34,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:08:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:34,745 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:08:34,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2021-07-13 20:08:34,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:34,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:34,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:34,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-07-13 20:08:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:34,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12587285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:34,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:34,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:08:34,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773471779] [2021-07-13 20:08:34,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:08:34,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:34,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:08:34,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:08:34,764 INFO L87 Difference]: Start difference. First operand 543 states and 1323 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:34,990 INFO L93 Difference]: Finished difference Result 787 states and 1911 transitions. [2021-07-13 20:08:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:08:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:34,993 INFO L225 Difference]: With dead ends: 787 [2021-07-13 20:08:34,993 INFO L226 Difference]: Without dead ends: 751 [2021-07-13 20:08:34,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:08:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-07-13 20:08:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 575. [2021-07-13 20:08:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.4442508710801394) internal successors, (1403), 574 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1403 transitions. [2021-07-13 20:08:35,007 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1403 transitions. Word has length 35 [2021-07-13 20:08:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:35,007 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1403 transitions. [2021-07-13 20:08:35,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1403 transitions. [2021-07-13 20:08:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:08:35,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:35,009 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:35,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:08:35,233 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1078125663, now seen corresponding path program 9 times [2021-07-13 20:08:35,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:35,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254250814] [2021-07-13 20:08:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:35,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:35,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254250814] [2021-07-13 20:08:35,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254250814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461675378] [2021-07-13 20:08:35,287 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 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 [2021-07-13 20:08:35,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:08:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:08:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:35,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461675378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:35,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:08:35,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124806697] [2021-07-13 20:08:35,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:08:35,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:08:35,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:08:35,392 INFO L87 Difference]: Start difference. First operand 575 states and 1403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:35,416 INFO L93 Difference]: Finished difference Result 1199 states and 2863 transitions. [2021-07-13 20:08:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:08:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:08:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:35,421 INFO L225 Difference]: With dead ends: 1199 [2021-07-13 20:08:35,421 INFO L226 Difference]: Without dead ends: 1191 [2021-07-13 20:08:35,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:08:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-07-13 20:08:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 671. [2021-07-13 20:08:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.476119402985075) internal successors, (1659), 670 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1659 transitions. [2021-07-13 20:08:35,453 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1659 transitions. Word has length 37 [2021-07-13 20:08:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:35,453 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1659 transitions. [2021-07-13 20:08:35,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1659 transitions. [2021-07-13 20:08:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:35,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:35,455 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:35,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:08:35,678 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1188270307, now seen corresponding path program 10 times [2021-07-13 20:08:35,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:35,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345272398] [2021-07-13 20:08:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:35,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:35,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345272398] [2021-07-13 20:08:35,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345272398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506976013] [2021-07-13 20:08:35,880 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 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 [2021-07-13 20:08:35,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:35,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:35,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:36,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:36,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:08:36,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:36,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:36,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:36,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:08:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:36,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506976013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:36,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:36,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 20:08:36,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805398534] [2021-07-13 20:08:36,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:08:36,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:08:36,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:08:36,203 INFO L87 Difference]: Start difference. First operand 671 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-07-13 20:08:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:36,741 INFO L93 Difference]: Finished difference Result 1511 states and 3681 transitions. [2021-07-13 20:08:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:08:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 41 [2021-07-13 20:08:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:36,747 INFO L225 Difference]: With dead ends: 1511 [2021-07-13 20:08:36,747 INFO L226 Difference]: Without dead ends: 1295 [2021-07-13 20:08:36,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-07-13 20:08:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 895. [2021-07-13 20:08:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.446308724832215) internal successors, (2187), 894 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2187 transitions. [2021-07-13 20:08:36,768 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2187 transitions. Word has length 41 [2021-07-13 20:08:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:36,768 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 2187 transitions. [2021-07-13 20:08:36,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-07-13 20:08:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2187 transitions. [2021-07-13 20:08:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:36,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:36,770 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:36,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:08:36,985 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1600033053, now seen corresponding path program 11 times [2021-07-13 20:08:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959118810] [2021-07-13 20:08:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:37,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959118810] [2021-07-13 20:08:37,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959118810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991082592] [2021-07-13 20:08:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:37,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:08:37,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:37,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:37,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:37,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:08:37,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:37,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:37,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:37,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:08:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:37,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991082592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:37,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 20:08:37,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346505819] [2021-07-13 20:08:37,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:08:37,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:37,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:08:37,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:08:37,533 INFO L87 Difference]: Start difference. First operand 895 states and 2187 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-07-13 20:08:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:37,951 INFO L93 Difference]: Finished difference Result 1927 states and 4811 transitions. [2021-07-13 20:08:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:08:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 41 [2021-07-13 20:08:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:37,959 INFO L225 Difference]: With dead ends: 1927 [2021-07-13 20:08:37,960 INFO L226 Difference]: Without dead ends: 1839 [2021-07-13 20:08:37,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-07-13 20:08:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 991. [2021-07-13 20:08:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.4434343434343435) internal successors, (2419), 990 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2419 transitions. [2021-07-13 20:08:37,988 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2419 transitions. Word has length 41 [2021-07-13 20:08:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:37,988 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 2419 transitions. [2021-07-13 20:08:37,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2021-07-13 20:08:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2419 transitions. [2021-07-13 20:08:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:37,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:37,990 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:38,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:38,206 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1099969309, now seen corresponding path program 12 times [2021-07-13 20:08:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:38,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102734542] [2021-07-13 20:08:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:38,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:38,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102734542] [2021-07-13 20:08:38,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102734542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289684645] [2021-07-13 20:08:38,409 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 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 [2021-07-13 20:08:38,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:08:38,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:38,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:08:38,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:38,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:38,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:38,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 31 [2021-07-13 20:08:38,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,816 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:08:38,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:89, output treesize:7 [2021-07-13 20:08:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:38,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289684645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:38,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 20:08:38,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702316268] [2021-07-13 20:08:38,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:08:38,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:08:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:08:38,832 INFO L87 Difference]: Start difference. First operand 991 states and 2419 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-07-13 20:08:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:39,547 INFO L93 Difference]: Finished difference Result 2259 states and 5553 transitions. [2021-07-13 20:08:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:08:39,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 41 [2021-07-13 20:08:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:39,559 INFO L225 Difference]: With dead ends: 2259 [2021-07-13 20:08:39,559 INFO L226 Difference]: Without dead ends: 2015 [2021-07-13 20:08:39,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:08:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-07-13 20:08:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1023. [2021-07-13 20:08:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.4452054794520546) internal successors, (2499), 1022 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2499 transitions. [2021-07-13 20:08:39,583 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2499 transitions. Word has length 41 [2021-07-13 20:08:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:39,584 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 2499 transitions. [2021-07-13 20:08:39,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-07-13 20:08:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2499 transitions. [2021-07-13 20:08:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:39,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:39,586 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:39,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:39,810 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 188453149, now seen corresponding path program 13 times [2021-07-13 20:08:39,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:39,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641625874] [2021-07-13 20:08:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:39,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641625874] [2021-07-13 20:08:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641625874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104238200] [2021-07-13 20:08:39,967 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 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 [2021-07-13 20:08:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:40,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:40,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:40,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:40,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:40,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:08:40,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:40,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:40,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:40,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:08:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:40,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104238200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:40,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:40,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 20:08:40,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859977819] [2021-07-13 20:08:40,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:08:40,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:08:40,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:08:40,256 INFO L87 Difference]: Start difference. First operand 1023 states and 2499 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:40,851 INFO L93 Difference]: Finished difference Result 2651 states and 6394 transitions. [2021-07-13 20:08:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:08:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:08:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:40,860 INFO L225 Difference]: With dead ends: 2651 [2021-07-13 20:08:40,860 INFO L226 Difference]: Without dead ends: 2391 [2021-07-13 20:08:40,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 578.8ms TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:08:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-13 20:08:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1391. [2021-07-13 20:08:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.4294964028776977) internal successors, (3377), 1390 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 3377 transitions. [2021-07-13 20:08:40,892 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 3377 transitions. Word has length 41 [2021-07-13 20:08:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:40,892 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 3377 transitions. [2021-07-13 20:08:40,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 3377 transitions. [2021-07-13 20:08:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:40,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:40,895 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:41,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:41,118 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:41,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1818274531, now seen corresponding path program 14 times [2021-07-13 20:08:41,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:41,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932256150] [2021-07-13 20:08:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:41,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:41,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932256150] [2021-07-13 20:08:41,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932256150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:41,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357176735] [2021-07-13 20:08:41,271 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 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 [2021-07-13 20:08:41,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:41,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:41,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:08:41,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:41,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:41,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:41,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:08:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357176735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:41,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:41,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 20:08:41,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134008238] [2021-07-13 20:08:41,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:08:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:41,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:08:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:08:41,613 INFO L87 Difference]: Start difference. First operand 1391 states and 3377 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:42,002 INFO L93 Difference]: Finished difference Result 2655 states and 6510 transitions. [2021-07-13 20:08:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:08:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:08:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:42,013 INFO L225 Difference]: With dead ends: 2655 [2021-07-13 20:08:42,013 INFO L226 Difference]: Without dead ends: 2567 [2021-07-13 20:08:42,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-07-13 20:08:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 1567. [2021-07-13 20:08:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 2.4272030651340994) internal successors, (3801), 1566 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 3801 transitions. [2021-07-13 20:08:42,049 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 3801 transitions. Word has length 41 [2021-07-13 20:08:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:42,049 INFO L482 AbstractCegarLoop]: Abstraction has 1567 states and 3801 transitions. [2021-07-13 20:08:42,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 3801 transitions. [2021-07-13 20:08:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:42,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:42,052 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:42,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:08:42,269 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1021887715, now seen corresponding path program 15 times [2021-07-13 20:08:42,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:42,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562499004] [2021-07-13 20:08:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:42,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562499004] [2021-07-13 20:08:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562499004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624663209] [2021-07-13 20:08:42,446 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 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 [2021-07-13 20:08:42,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:08:42,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:42,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:08:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:42,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:42,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:42,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:42,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:08:42,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:42,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:42,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:42,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:08:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:42,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624663209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:42,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:42,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2021-07-13 20:08:42,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540695570] [2021-07-13 20:08:42,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:08:42,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:42,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:08:42,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:08:42,754 INFO L87 Difference]: Start difference. First operand 1567 states and 3801 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2021-07-13 20:08:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:43,242 INFO L93 Difference]: Finished difference Result 2887 states and 6964 transitions. [2021-07-13 20:08:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:08:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 41 [2021-07-13 20:08:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:43,249 INFO L225 Difference]: With dead ends: 2887 [2021-07-13 20:08:43,249 INFO L226 Difference]: Without dead ends: 2695 [2021-07-13 20:08:43,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:08:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-07-13 20:08:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1727. [2021-07-13 20:08:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.4281575898030128) internal successors, (4191), 1726 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4191 transitions. [2021-07-13 20:08:43,288 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4191 transitions. Word has length 41 [2021-07-13 20:08:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:43,288 INFO L482 AbstractCegarLoop]: Abstraction has 1727 states and 4191 transitions. [2021-07-13 20:08:43,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2021-07-13 20:08:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4191 transitions. [2021-07-13 20:08:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:43,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:43,292 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:43,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:08:43,509 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1266351901, now seen corresponding path program 16 times [2021-07-13 20:08:43,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:43,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313010890] [2021-07-13 20:08:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:43,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:43,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313010890] [2021-07-13 20:08:43,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313010890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:43,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551868334] [2021-07-13 20:08:43,670 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 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 [2021-07-13 20:08:43,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:43,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:43,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:43,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:08:43,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:43,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:43,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:43,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:08:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:43,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551868334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:43,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:43,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 20:08:43,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431569096] [2021-07-13 20:08:43,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:08:43,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:43,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:08:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:08:43,997 INFO L87 Difference]: Start difference. First operand 1727 states and 4191 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-07-13 20:08:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:44,416 INFO L93 Difference]: Finished difference Result 3015 states and 7407 transitions. [2021-07-13 20:08:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:08:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 41 [2021-07-13 20:08:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:44,422 INFO L225 Difference]: With dead ends: 3015 [2021-07-13 20:08:44,423 INFO L226 Difference]: Without dead ends: 2927 [2021-07-13 20:08:44,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-07-13 20:08:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1727. [2021-07-13 20:08:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.4281575898030128) internal successors, (4191), 1726 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4191 transitions. [2021-07-13 20:08:44,458 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4191 transitions. Word has length 41 [2021-07-13 20:08:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:44,458 INFO L482 AbstractCegarLoop]: Abstraction has 1727 states and 4191 transitions. [2021-07-13 20:08:44,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-07-13 20:08:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4191 transitions. [2021-07-13 20:08:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:08:44,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:44,461 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:44,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:08:44,677 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1741431069, now seen corresponding path program 17 times [2021-07-13 20:08:44,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:44,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516244394] [2021-07-13 20:08:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:44,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516244394] [2021-07-13 20:08:44,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516244394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:44,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695492854] [2021-07-13 20:08:44,852 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 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 [2021-07-13 20:08:44,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:08:44,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:08:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:45,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:45,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:45,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-13 20:08:45,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:45,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:45,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:45,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-13 20:08:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:45,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695492854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:45,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:45,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 20:08:45,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173594411] [2021-07-13 20:08:45,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:08:45,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:45,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:08:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:08:45,191 INFO L87 Difference]: Start difference. First operand 1727 states and 4191 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:45,691 INFO L93 Difference]: Finished difference Result 2859 states and 6894 transitions. [2021-07-13 20:08:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:08:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:08:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:45,696 INFO L225 Difference]: With dead ends: 2859 [2021-07-13 20:08:45,696 INFO L226 Difference]: Without dead ends: 2583 [2021-07-13 20:08:45,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-07-13 20:08:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1903. [2021-07-13 20:08:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.429547844374343) internal successors, (4621), 1902 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 4621 transitions. [2021-07-13 20:08:45,734 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 4621 transitions. Word has length 41 [2021-07-13 20:08:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:45,734 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 4621 transitions. [2021-07-13 20:08:45,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 4621 transitions. [2021-07-13 20:08:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:45,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:45,738 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:45,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:08:45,953 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:45,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1886074107, now seen corresponding path program 18 times [2021-07-13 20:08:45,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:45,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575838245] [2021-07-13 20:08:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:46,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:46,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575838245] [2021-07-13 20:08:46,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575838245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:46,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97069729] [2021-07-13 20:08:46,136 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 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 [2021-07-13 20:08:46,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:08:46,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:08:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:46,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:46,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:46,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:08:46,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:46,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:46,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:46,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:08:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:46,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97069729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:46,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:46,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-07-13 20:08:46,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606800871] [2021-07-13 20:08:46,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:08:46,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:46,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:08:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:08:46,541 INFO L87 Difference]: Start difference. First operand 1903 states and 4621 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:47,194 INFO L93 Difference]: Finished difference Result 3311 states and 8145 transitions. [2021-07-13 20:08:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:08:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:47,201 INFO L225 Difference]: With dead ends: 3311 [2021-07-13 20:08:47,201 INFO L226 Difference]: Without dead ends: 3247 [2021-07-13 20:08:47,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 577.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:08:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-07-13 20:08:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 1951. [2021-07-13 20:08:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 2.427179487179487) internal successors, (4733), 1950 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 4733 transitions. [2021-07-13 20:08:47,238 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 4733 transitions. Word has length 47 [2021-07-13 20:08:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:47,238 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 4733 transitions. [2021-07-13 20:08:47,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 4733 transitions. [2021-07-13 20:08:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:47,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:47,241 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:47,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:08:47,464 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash -623310085, now seen corresponding path program 19 times [2021-07-13 20:08:47,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:47,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281809195] [2021-07-13 20:08:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:47,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:47,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281809195] [2021-07-13 20:08:47,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281809195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967436706] [2021-07-13 20:08:47,676 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 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 [2021-07-13 20:08:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:08:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:48,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:48,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:48,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:48,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:08:48,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:48,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:48,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:48,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:08:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:48,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967436706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:48,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:48,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-07-13 20:08:48,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820166885] [2021-07-13 20:08:48,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:08:48,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:48,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:08:48,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:08:48,083 INFO L87 Difference]: Start difference. First operand 1951 states and 4733 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 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) [2021-07-13 20:08:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:48,704 INFO L93 Difference]: Finished difference Result 2795 states and 6809 transitions. [2021-07-13 20:08:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:48,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 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 47 [2021-07-13 20:08:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:48,713 INFO L225 Difference]: With dead ends: 2795 [2021-07-13 20:08:48,713 INFO L226 Difference]: Without dead ends: 2735 [2021-07-13 20:08:48,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 695.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-07-13 20:08:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 1775. [2021-07-13 20:08:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.4255918827508456) internal successors, (4303), 1774 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 4303 transitions. [2021-07-13 20:08:48,748 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 4303 transitions. Word has length 47 [2021-07-13 20:08:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:48,748 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 4303 transitions. [2021-07-13 20:08:48,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 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) [2021-07-13 20:08:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 4303 transitions. [2021-07-13 20:08:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:48,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:48,755 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:48,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:48,978 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:48,978 INFO L82 PathProgramCache]: Analyzing trace with hash 509730555, now seen corresponding path program 20 times [2021-07-13 20:08:48,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:48,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427999436] [2021-07-13 20:08:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:49,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:49,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427999436] [2021-07-13 20:08:49,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427999436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:49,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859494701] [2021-07-13 20:08:49,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:49,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:49,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:08:49,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:49,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:49,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:49,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:08:49,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:49,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:49,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:49,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:08:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:49,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859494701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:49,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:49,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-07-13 20:08:49,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529928784] [2021-07-13 20:08:49,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:08:49,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:08:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:08:49,614 INFO L87 Difference]: Start difference. First operand 1775 states and 4303 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-07-13 20:08:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:50,195 INFO L93 Difference]: Finished difference Result 3447 states and 8527 transitions. [2021-07-13 20:08:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 47 [2021-07-13 20:08:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:50,203 INFO L225 Difference]: With dead ends: 3447 [2021-07-13 20:08:50,203 INFO L226 Difference]: Without dead ends: 3359 [2021-07-13 20:08:50,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 613.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:08:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2021-07-13 20:08:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 1535. [2021-07-13 20:08:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 2.4400260756192957) internal successors, (3743), 1534 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 3743 transitions. [2021-07-13 20:08:50,263 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 3743 transitions. Word has length 47 [2021-07-13 20:08:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:50,263 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 3743 transitions. [2021-07-13 20:08:50,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-07-13 20:08:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 3743 transitions. [2021-07-13 20:08:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:50,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:50,269 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:50,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:08:50,485 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2131831045, now seen corresponding path program 21 times [2021-07-13 20:08:50,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:50,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119154352] [2021-07-13 20:08:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:08:50,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:50,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119154352] [2021-07-13 20:08:50,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119154352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:50,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960815576] [2021-07-13 20:08:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:50,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:08:50,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:50,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:08:50,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:51,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:51,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 36 [2021-07-13 20:08:51,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:51,251 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:08:51,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:51,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:104, output treesize:7 [2021-07-13 20:08:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:51,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960815576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:51,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:51,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-07-13 20:08:51,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656672607] [2021-07-13 20:08:51,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:08:51,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:51,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:08:51,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:08:51,264 INFO L87 Difference]: Start difference. First operand 1535 states and 3743 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-07-13 20:08:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:52,457 INFO L93 Difference]: Finished difference Result 2779 states and 6803 transitions. [2021-07-13 20:08:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:08:52,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 47 [2021-07-13 20:08:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:52,461 INFO L225 Difference]: With dead ends: 2779 [2021-07-13 20:08:52,461 INFO L226 Difference]: Without dead ends: 2591 [2021-07-13 20:08:52,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 903.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:08:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-07-13 20:08:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1679. [2021-07-13 20:08:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.435637663885578) internal successors, (4087), 1678 states have internal predecessors, (4087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4087 transitions. [2021-07-13 20:08:52,484 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4087 transitions. Word has length 47 [2021-07-13 20:08:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:52,484 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4087 transitions. [2021-07-13 20:08:52,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-07-13 20:08:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4087 transitions. [2021-07-13 20:08:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:52,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:52,487 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:52,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:52,701 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1991114501, now seen corresponding path program 22 times [2021-07-13 20:08:52,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:52,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62084715] [2021-07-13 20:08:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:52,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62084715] [2021-07-13 20:08:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62084715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782999601] [2021-07-13 20:08:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:52,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:08:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:53,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:08:53,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:53,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:08:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:53,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782999601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:53,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:53,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 20:08:53,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142471362] [2021-07-13 20:08:53,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:08:53,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:53,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:08:53,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:08:53,338 INFO L87 Difference]: Start difference. First operand 1679 states and 4087 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-07-13 20:08:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:53,957 INFO L93 Difference]: Finished difference Result 3239 states and 8031 transitions. [2021-07-13 20:08:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 47 [2021-07-13 20:08:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:53,962 INFO L225 Difference]: With dead ends: 3239 [2021-07-13 20:08:53,962 INFO L226 Difference]: Without dead ends: 3151 [2021-07-13 20:08:53,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:08:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-07-13 20:08:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 1487. [2021-07-13 20:08:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.4488559892328396) internal successors, (3639), 1486 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3639 transitions. [2021-07-13 20:08:53,992 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3639 transitions. Word has length 47 [2021-07-13 20:08:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:53,992 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 3639 transitions. [2021-07-13 20:08:53,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-07-13 20:08:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3639 transitions. [2021-07-13 20:08:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:53,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:53,995 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:54,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:08:54,203 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:54,204 INFO L82 PathProgramCache]: Analyzing trace with hash 93498107, now seen corresponding path program 23 times [2021-07-13 20:08:54,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:54,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668162889] [2021-07-13 20:08:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:54,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:54,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668162889] [2021-07-13 20:08:54,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668162889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:54,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34728749] [2021-07-13 20:08:54,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:54,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:08:54,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:08:54,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:54,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:54,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:54,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:54,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:54,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:08:54,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:54,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:54,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:54,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:08:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:54,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34728749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:54,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:54,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-07-13 20:08:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392835465] [2021-07-13 20:08:54,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:08:54,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:08:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:08:54,914 INFO L87 Difference]: Start difference. First operand 1487 states and 3639 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-07-13 20:08:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:55,433 INFO L93 Difference]: Finished difference Result 2771 states and 6747 transitions. [2021-07-13 20:08:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:08:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 47 [2021-07-13 20:08:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:55,437 INFO L225 Difference]: With dead ends: 2771 [2021-07-13 20:08:55,438 INFO L226 Difference]: Without dead ends: 2479 [2021-07-13 20:08:55,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:08:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-07-13 20:08:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1727. [2021-07-13 20:08:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.437427578215527) internal successors, (4207), 1726 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4207 transitions. [2021-07-13 20:08:55,464 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4207 transitions. Word has length 47 [2021-07-13 20:08:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:55,464 INFO L482 AbstractCegarLoop]: Abstraction has 1727 states and 4207 transitions. [2021-07-13 20:08:55,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-07-13 20:08:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4207 transitions. [2021-07-13 20:08:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:55,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:55,467 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:55,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:55,672 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash -465548037, now seen corresponding path program 24 times [2021-07-13 20:08:55,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:55,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480032877] [2021-07-13 20:08:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:55,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:55,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480032877] [2021-07-13 20:08:55,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480032877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340171830] [2021-07-13 20:08:55,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:55,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:08:55,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:08:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:56,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 36 [2021-07-13 20:08:56,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:56,612 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-13 20:08:56,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:56,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:105, output treesize:7 [2021-07-13 20:08:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:56,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340171830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:56,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:56,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-07-13 20:08:56,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634049194] [2021-07-13 20:08:56,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:08:56,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:08:56,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:08:56,626 INFO L87 Difference]: Start difference. First operand 1727 states and 4207 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-07-13 20:09:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:01,363 INFO L93 Difference]: Finished difference Result 3635 states and 8859 transitions. [2021-07-13 20:09:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:01,363 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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 47 [2021-07-13 20:09:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:01,368 INFO L225 Difference]: With dead ends: 3635 [2021-07-13 20:09:01,368 INFO L226 Difference]: Without dead ends: 3279 [2021-07-13 20:09:01,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1339.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:09:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-07-13 20:09:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1775. [2021-07-13 20:09:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.4436302142051862) internal successors, (4335), 1774 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 4335 transitions. [2021-07-13 20:09:01,399 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 4335 transitions. Word has length 47 [2021-07-13 20:09:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:01,399 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 4335 transitions. [2021-07-13 20:09:01,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-07-13 20:09:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 4335 transitions. [2021-07-13 20:09:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:01,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:01,402 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:01,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:09:01,603 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2011837691, now seen corresponding path program 25 times [2021-07-13 20:09:01,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:01,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005714083] [2021-07-13 20:09:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:01,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005714083] [2021-07-13 20:09:01,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005714083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677736487] [2021-07-13 20:09:01,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:09:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:02,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:02,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:02,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:09:02,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:02,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:09:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:02,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677736487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:02,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:02,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-07-13 20:09:02,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147456039] [2021-07-13 20:09:02,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:09:02,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:09:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:09:02,302 INFO L87 Difference]: Start difference. First operand 1775 states and 4335 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:03,123 INFO L93 Difference]: Finished difference Result 3459 states and 8391 transitions. [2021-07-13 20:09:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:03,128 INFO L225 Difference]: With dead ends: 3459 [2021-07-13 20:09:03,128 INFO L226 Difference]: Without dead ends: 3151 [2021-07-13 20:09:03,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 865.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-07-13 20:09:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2079. [2021-07-13 20:09:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.433589990375361) internal successors, (5057), 2078 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5057 transitions. [2021-07-13 20:09:03,165 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5057 transitions. Word has length 47 [2021-07-13 20:09:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:03,165 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 5057 transitions. [2021-07-13 20:09:03,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5057 transitions. [2021-07-13 20:09:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:03,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:03,169 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:03,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:03,385 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash 795539707, now seen corresponding path program 26 times [2021-07-13 20:09:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:03,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627930040] [2021-07-13 20:09:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:03,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:03,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627930040] [2021-07-13 20:09:03,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627930040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:03,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637692672] [2021-07-13 20:09:03,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:03,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:03,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:03,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:09:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:03,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:03,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:09:03,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:03,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:03,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:03,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:09:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:03,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637692672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:03,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:03,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-07-13 20:09:03,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172287420] [2021-07-13 20:09:03,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:09:03,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:03,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:09:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:09:03,958 INFO L87 Difference]: Start difference. First operand 2079 states and 5057 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:04,864 INFO L93 Difference]: Finished difference Result 3203 states and 7713 transitions. [2021-07-13 20:09:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:04,868 INFO L225 Difference]: With dead ends: 3203 [2021-07-13 20:09:04,869 INFO L226 Difference]: Without dead ends: 2875 [2021-07-13 20:09:04,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 745.5ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-07-13 20:09:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1595. [2021-07-13 20:09:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 2.4084065244667503) internal successors, (3839), 1594 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 3839 transitions. [2021-07-13 20:09:04,896 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 3839 transitions. Word has length 47 [2021-07-13 20:09:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:04,896 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 3839 transitions. [2021-07-13 20:09:04,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 3839 transitions. [2021-07-13 20:09:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:04,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:04,899 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:05,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:09:05,121 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash -281774341, now seen corresponding path program 27 times [2021-07-13 20:09:05,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:05,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602458488] [2021-07-13 20:09:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:05,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:05,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602458488] [2021-07-13 20:09:05,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602458488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:05,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938358038] [2021-07-13 20:09:05,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:05,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:09:05,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:05,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:09:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:05,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:05,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:09:05,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:05,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:05,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:05,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:09:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:05,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938358038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:05,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:05,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-07-13 20:09:05,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285029692] [2021-07-13 20:09:05,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:09:05,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:05,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:09:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:09:05,702 INFO L87 Difference]: Start difference. First operand 1595 states and 3839 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:06,408 INFO L93 Difference]: Finished difference Result 2927 states and 7131 transitions. [2021-07-13 20:09:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:09:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:06,412 INFO L225 Difference]: With dead ends: 2927 [2021-07-13 20:09:06,412 INFO L226 Difference]: Without dead ends: 2795 [2021-07-13 20:09:06,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:09:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-07-13 20:09:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1659. [2021-07-13 20:09:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 2.4119420989143547) internal successors, (3999), 1658 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3999 transitions. [2021-07-13 20:09:06,436 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3999 transitions. Word has length 47 [2021-07-13 20:09:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:06,436 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3999 transitions. [2021-07-13 20:09:06,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3999 transitions. [2021-07-13 20:09:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:06,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:06,439 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:06,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:06,663 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:06,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1629840645, now seen corresponding path program 28 times [2021-07-13 20:09:06,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:06,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974688819] [2021-07-13 20:09:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:06,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:06,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974688819] [2021-07-13 20:09:06,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974688819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:06,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602955180] [2021-07-13 20:09:06,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:09:06,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:06,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:09:06,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:07,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:09:07,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:07,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:09:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:07,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602955180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:07,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:07,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-07-13 20:09:07,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757518166] [2021-07-13 20:09:07,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:07,193 INFO L87 Difference]: Start difference. First operand 1659 states and 3999 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-07-13 20:09:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:07,990 INFO L93 Difference]: Finished difference Result 3391 states and 8167 transitions. [2021-07-13 20:09:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 47 [2021-07-13 20:09:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:07,994 INFO L225 Difference]: With dead ends: 3391 [2021-07-13 20:09:07,994 INFO L226 Difference]: Without dead ends: 3063 [2021-07-13 20:09:07,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:09:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2021-07-13 20:09:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2039. [2021-07-13 20:09:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 2.4077526987242392) internal successors, (4907), 2038 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 4907 transitions. [2021-07-13 20:09:08,031 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 4907 transitions. Word has length 47 [2021-07-13 20:09:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:08,031 INFO L482 AbstractCegarLoop]: Abstraction has 2039 states and 4907 transitions. [2021-07-13 20:09:08,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-07-13 20:09:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 4907 transitions. [2021-07-13 20:09:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:08,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:08,034 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:08,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:09:08,256 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash -637516549, now seen corresponding path program 29 times [2021-07-13 20:09:08,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:08,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352814905] [2021-07-13 20:09:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:08,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:08,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352814905] [2021-07-13 20:09:08,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352814905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:08,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902656836] [2021-07-13 20:09:08,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:08,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:09:08,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:08,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:09:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:08,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:08,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:09:08,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:08,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:08,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:08,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:09:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:08,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902656836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:08,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:08,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-07-13 20:09:08,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094759854] [2021-07-13 20:09:08,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:08,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:08,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:08,825 INFO L87 Difference]: Start difference. First operand 2039 states and 4907 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-07-13 20:09:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:09,423 INFO L93 Difference]: Finished difference Result 4059 states and 9831 transitions. [2021-07-13 20:09:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:09:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 47 [2021-07-13 20:09:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:09,428 INFO L225 Difference]: With dead ends: 4059 [2021-07-13 20:09:09,429 INFO L226 Difference]: Without dead ends: 3783 [2021-07-13 20:09:09,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 611.2ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:09:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-07-13 20:09:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 2055. [2021-07-13 20:09:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.408471275559883) internal successors, (4947), 2054 states have internal predecessors, (4947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 4947 transitions. [2021-07-13 20:09:09,467 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 4947 transitions. Word has length 47 [2021-07-13 20:09:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:09,467 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 4947 transitions. [2021-07-13 20:09:09,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2021-07-13 20:09:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 4947 transitions. [2021-07-13 20:09:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:09,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:09,470 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:09,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:09:09,692 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1587812603, now seen corresponding path program 30 times [2021-07-13 20:09:09,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:09,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763878266] [2021-07-13 20:09:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:09,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763878266] [2021-07-13 20:09:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763878266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236840592] [2021-07-13 20:09:09,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:09,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:09:09,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:09:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:10,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:10,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:09:10,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:10,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:10,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:10,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-13 20:09:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:10,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236840592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:10,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:10,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 20:09:10,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095676579] [2021-07-13 20:09:10,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:09:10,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:10,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:09:10,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:09:10,336 INFO L87 Difference]: Start difference. First operand 2055 states and 4947 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2021-07-13 20:09:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:10,929 INFO L93 Difference]: Finished difference Result 3563 states and 8687 transitions. [2021-07-13 20:09:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:09:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 47 [2021-07-13 20:09:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:10,934 INFO L225 Difference]: With dead ends: 3563 [2021-07-13 20:09:10,934 INFO L226 Difference]: Without dead ends: 3479 [2021-07-13 20:09:10,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:09:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2021-07-13 20:09:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2167. [2021-07-13 20:09:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.4132040627885503) internal successors, (5227), 2166 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5227 transitions. [2021-07-13 20:09:10,972 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5227 transitions. Word has length 47 [2021-07-13 20:09:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:10,972 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 5227 transitions. [2021-07-13 20:09:10,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2021-07-13 20:09:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5227 transitions. [2021-07-13 20:09:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:10,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:10,976 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:11,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:09:11,198 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash -849198341, now seen corresponding path program 31 times [2021-07-13 20:09:11,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:11,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167608559] [2021-07-13 20:09:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:11,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:11,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167608559] [2021-07-13 20:09:11,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167608559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:11,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714626463] [2021-07-13 20:09:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:11,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:09:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:11,734 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-07-13 20:09:11,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-07-13 20:09:11,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:11,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:11,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:11,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-07-13 20:09:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:11,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714626463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:11,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:11,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-07-13 20:09:11,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108107598] [2021-07-13 20:09:11,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:11,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:11,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:11,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:11,755 INFO L87 Difference]: Start difference. First operand 2167 states and 5227 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:12,297 INFO L93 Difference]: Finished difference Result 3035 states and 7367 transitions. [2021-07-13 20:09:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:09:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:12,301 INFO L225 Difference]: With dead ends: 3035 [2021-07-13 20:09:12,301 INFO L226 Difference]: Without dead ends: 2999 [2021-07-13 20:09:12,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:09:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2021-07-13 20:09:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2199. [2021-07-13 20:09:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.414467697907188) internal successors, (5307), 2198 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 5307 transitions. [2021-07-13 20:09:12,325 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 5307 transitions. Word has length 47 [2021-07-13 20:09:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:12,325 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 5307 transitions. [2021-07-13 20:09:12,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 5307 transitions. [2021-07-13 20:09:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:09:12,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:12,328 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:12,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:09:12,529 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:12,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1873760509, now seen corresponding path program 32 times [2021-07-13 20:09:12,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:12,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797534711] [2021-07-13 20:09:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:09:12,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797534711] [2021-07-13 20:09:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797534711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111548144] [2021-07-13 20:09:12,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:12,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:12,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:09:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:09:12,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111548144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:12,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:12,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:09:12,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323062067] [2021-07-13 20:09:12,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:09:12,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:12,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:09:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:09:12,688 INFO L87 Difference]: Start difference. First operand 2199 states and 5307 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:12,721 INFO L93 Difference]: Finished difference Result 3179 states and 7642 transitions. [2021-07-13 20:09:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:09:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-13 20:09:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:12,727 INFO L225 Difference]: With dead ends: 3179 [2021-07-13 20:09:12,727 INFO L226 Difference]: Without dead ends: 3171 [2021-07-13 20:09:12,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:09:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2021-07-13 20:09:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2767. [2021-07-13 20:09:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 2.447939262472885) internal successors, (6771), 2766 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 6771 transitions. [2021-07-13 20:09:12,766 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 6771 transitions. Word has length 49 [2021-07-13 20:09:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:12,766 INFO L482 AbstractCegarLoop]: Abstraction has 2767 states and 6771 transitions. [2021-07-13 20:09:12,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 6771 transitions. [2021-07-13 20:09:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:09:12,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:12,770 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:12,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:09:12,993 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2040143101, now seen corresponding path program 33 times [2021-07-13 20:09:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681283888] [2021-07-13 20:09:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:13,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:13,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681283888] [2021-07-13 20:09:13,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681283888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:13,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110689173] [2021-07-13 20:09:13,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:13,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:09:13,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:13,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:09:13,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:13,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110689173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:13,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:13,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 20:09:13,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565251751] [2021-07-13 20:09:13,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:09:13,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:13,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:09:13,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:09:13,144 INFO L87 Difference]: Start difference. First operand 2767 states and 6771 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:13,184 INFO L93 Difference]: Finished difference Result 4039 states and 9821 transitions. [2021-07-13 20:09:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:09:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-13 20:09:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:13,191 INFO L225 Difference]: With dead ends: 4039 [2021-07-13 20:09:13,191 INFO L226 Difference]: Without dead ends: 4031 [2021-07-13 20:09:13,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:09:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-07-13 20:09:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 2975. [2021-07-13 20:09:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 2.456960322797579) internal successors, (7307), 2974 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 7307 transitions. [2021-07-13 20:09:13,254 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 7307 transitions. Word has length 49 [2021-07-13 20:09:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:13,254 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 7307 transitions. [2021-07-13 20:09:13,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 7307 transitions. [2021-07-13 20:09:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:13,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:13,259 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:13,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:09:13,472 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1607749511, now seen corresponding path program 34 times [2021-07-13 20:09:13,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:13,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654052000] [2021-07-13 20:09:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:13,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:13,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654052000] [2021-07-13 20:09:13,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654052000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:13,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878021687] [2021-07-13 20:09:13,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:13,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:13,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:13,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:13,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:14,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:14,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:14,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:14,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:14,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:14,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878021687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:14,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:14,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-07-13 20:09:14,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700821892] [2021-07-13 20:09:14,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:09:14,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:09:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:09:14,338 INFO L87 Difference]: Start difference. First operand 2975 states and 7307 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:15,293 INFO L93 Difference]: Finished difference Result 6999 states and 17467 transitions. [2021-07-13 20:09:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:15,302 INFO L225 Difference]: With dead ends: 6999 [2021-07-13 20:09:15,302 INFO L226 Difference]: Without dead ends: 6863 [2021-07-13 20:09:15,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6863 states. [2021-07-13 20:09:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6863 to 3231. [2021-07-13 20:09:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 2.4554179566563468) internal successors, (7931), 3230 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 7931 transitions. [2021-07-13 20:09:15,353 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 7931 transitions. Word has length 53 [2021-07-13 20:09:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:15,353 INFO L482 AbstractCegarLoop]: Abstraction has 3231 states and 7931 transitions. [2021-07-13 20:09:15,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 7931 transitions. [2021-07-13 20:09:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:15,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:15,356 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:15,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 20:09:15,573 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:15,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1426435463, now seen corresponding path program 35 times [2021-07-13 20:09:15,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:15,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299236316] [2021-07-13 20:09:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:15,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:15,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299236316] [2021-07-13 20:09:15,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299236316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:15,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999449786] [2021-07-13 20:09:15,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:15,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:09:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:16,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:16,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:16,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:16,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:16,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-07-13 20:09:16,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:16,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:16,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:16,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-07-13 20:09:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:16,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999449786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:16,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:16,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:09:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846528460] [2021-07-13 20:09:16,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:09:16,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:16,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:09:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:16,390 INFO L87 Difference]: Start difference. First operand 3231 states and 7931 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:17,217 INFO L93 Difference]: Finished difference Result 6839 states and 17099 transitions. [2021-07-13 20:09:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:17,226 INFO L225 Difference]: With dead ends: 6839 [2021-07-13 20:09:17,227 INFO L226 Difference]: Without dead ends: 6703 [2021-07-13 20:09:17,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=247, Invalid=2105, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:09:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2021-07-13 20:09:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 2751. [2021-07-13 20:09:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2750 states have (on average 2.4592727272727273) internal successors, (6763), 2750 states have internal predecessors, (6763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 6763 transitions. [2021-07-13 20:09:17,274 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 6763 transitions. Word has length 53 [2021-07-13 20:09:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:17,274 INFO L482 AbstractCegarLoop]: Abstraction has 2751 states and 6763 transitions. [2021-07-13 20:09:17,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 6763 transitions. [2021-07-13 20:09:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:17,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:17,277 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:17,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:17,477 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:17,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:17,478 INFO L82 PathProgramCache]: Analyzing trace with hash -602883975, now seen corresponding path program 36 times [2021-07-13 20:09:17,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:17,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38432594] [2021-07-13 20:09:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:17,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:17,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38432594] [2021-07-13 20:09:17,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38432594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:17,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378629230] [2021-07-13 20:09:17,702 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 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 [2021-07-13 20:09:17,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:09:17,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:17,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:17,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:18,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:18,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:18,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:18,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:18,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:18,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:18,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:18,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378629230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:18,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:18,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-07-13 20:09:18,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440970850] [2021-07-13 20:09:18,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:09:18,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:09:18,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:09:18,209 INFO L87 Difference]: Start difference. First operand 2751 states and 6763 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:18,965 INFO L93 Difference]: Finished difference Result 5519 states and 13767 transitions. [2021-07-13 20:09:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:09:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:18,973 INFO L225 Difference]: With dead ends: 5519 [2021-07-13 20:09:18,974 INFO L226 Difference]: Without dead ends: 5231 [2021-07-13 20:09:18,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:09:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2021-07-13 20:09:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 2911. [2021-07-13 20:09:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.4560137457044675) internal successors, (7147), 2910 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 7147 transitions. [2021-07-13 20:09:19,016 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 7147 transitions. Word has length 53 [2021-07-13 20:09:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:19,016 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 7147 transitions. [2021-07-13 20:09:19,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 7147 transitions. [2021-07-13 20:09:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:19,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:19,020 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:19,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:19,221 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:19,221 INFO L82 PathProgramCache]: Analyzing trace with hash -627868551, now seen corresponding path program 37 times [2021-07-13 20:09:19,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:19,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770837469] [2021-07-13 20:09:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:19,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:19,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770837469] [2021-07-13 20:09:19,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770837469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:19,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013606121] [2021-07-13 20:09:19,476 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 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 [2021-07-13 20:09:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:20,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:20,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:20,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:20,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:20,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:20,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:20,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:20,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:20,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:20,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:20,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013606121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:20,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:20,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-07-13 20:09:20,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187167178] [2021-07-13 20:09:20,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:09:20,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:09:20,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:20,082 INFO L87 Difference]: Start difference. First operand 2911 states and 7147 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:20,890 INFO L93 Difference]: Finished difference Result 5847 states and 14547 transitions. [2021-07-13 20:09:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:09:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:20,899 INFO L225 Difference]: With dead ends: 5847 [2021-07-13 20:09:20,899 INFO L226 Difference]: Without dead ends: 5759 [2021-07-13 20:09:20,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:09:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2021-07-13 20:09:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 2879. [2021-07-13 20:09:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.4555246699096593) internal successors, (7067), 2878 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 7067 transitions. [2021-07-13 20:09:20,980 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 7067 transitions. Word has length 53 [2021-07-13 20:09:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:20,980 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 7067 transitions. [2021-07-13 20:09:20,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 7067 transitions. [2021-07-13 20:09:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:20,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:20,983 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:21,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:21,183 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:21,184 INFO L82 PathProgramCache]: Analyzing trace with hash 656678521, now seen corresponding path program 38 times [2021-07-13 20:09:21,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:21,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649696812] [2021-07-13 20:09:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:21,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649696812] [2021-07-13 20:09:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649696812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327522607] [2021-07-13 20:09:21,450 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 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 [2021-07-13 20:09:21,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:21,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:21,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:21,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:21,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:21,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:21,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:21,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:21,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:21,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:21,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:21,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:21,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327522607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:21,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:21,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-07-13 20:09:21,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938742148] [2021-07-13 20:09:21,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:09:21,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:21,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:09:21,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:21,974 INFO L87 Difference]: Start difference. First operand 2879 states and 7067 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:22,638 INFO L93 Difference]: Finished difference Result 4567 states and 11291 transitions. [2021-07-13 20:09:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:09:22,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:22,644 INFO L225 Difference]: With dead ends: 4567 [2021-07-13 20:09:22,645 INFO L226 Difference]: Without dead ends: 4527 [2021-07-13 20:09:22,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 828.3ms TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:09:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-07-13 20:09:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 2911. [2021-07-13 20:09:22,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.4560137457044675) internal successors, (7147), 2910 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 7147 transitions. [2021-07-13 20:09:22,699 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 7147 transitions. Word has length 53 [2021-07-13 20:09:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:22,699 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 7147 transitions. [2021-07-13 20:09:22,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 7147 transitions. [2021-07-13 20:09:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:22,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:22,703 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:22,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:09:22,917 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -159589767, now seen corresponding path program 39 times [2021-07-13 20:09:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474269649] [2021-07-13 20:09:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:23,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474269649] [2021-07-13 20:09:23,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474269649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145882053] [2021-07-13 20:09:23,138 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 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 [2021-07-13 20:09:23,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:09:23,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:23,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:23,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:23,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:23,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:23,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:23,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:23,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145882053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:23,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:23,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-07-13 20:09:23,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480562592] [2021-07-13 20:09:23,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:09:23,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:23,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:09:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:09:23,639 INFO L87 Difference]: Start difference. First operand 2911 states and 7147 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:24,964 INFO L93 Difference]: Finished difference Result 6415 states and 15812 transitions. [2021-07-13 20:09:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:24,972 INFO L225 Difference]: With dead ends: 6415 [2021-07-13 20:09:24,972 INFO L226 Difference]: Without dead ends: 6007 [2021-07-13 20:09:24,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1122.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:09:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2021-07-13 20:09:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 3503. [2021-07-13 20:09:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.454311821816105) internal successors, (8595), 3502 states have internal predecessors, (8595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 8595 transitions. [2021-07-13 20:09:25,025 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 8595 transitions. Word has length 53 [2021-07-13 20:09:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:25,026 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 8595 transitions. [2021-07-13 20:09:25,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 8595 transitions. [2021-07-13 20:09:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:25,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:25,030 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:25,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:25,233 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash -184574343, now seen corresponding path program 40 times [2021-07-13 20:09:25,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:25,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620091004] [2021-07-13 20:09:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:25,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620091004] [2021-07-13 20:09:25,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620091004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111239307] [2021-07-13 20:09:25,508 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 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 [2021-07-13 20:09:25,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:26,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:26,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:26,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:26,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:26,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111239307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:26,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:26,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-07-13 20:09:26,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222878504] [2021-07-13 20:09:26,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:09:26,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:26,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:09:26,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:09:26,082 INFO L87 Difference]: Start difference. First operand 3503 states and 8595 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:26,951 INFO L93 Difference]: Finished difference Result 6639 states and 16432 transitions. [2021-07-13 20:09:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:26,952 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:26,960 INFO L225 Difference]: With dead ends: 6639 [2021-07-13 20:09:26,960 INFO L226 Difference]: Without dead ends: 6551 [2021-07-13 20:09:26,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 955.0ms TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-07-13 20:09:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 3455. [2021-07-13 20:09:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 2.4536768963520554) internal successors, (8475), 3454 states have internal predecessors, (8475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 8475 transitions. [2021-07-13 20:09:27,023 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 8475 transitions. Word has length 53 [2021-07-13 20:09:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:27,024 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 8475 transitions. [2021-07-13 20:09:27,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 8475 transitions. [2021-07-13 20:09:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:27,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:27,028 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:27,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:27,228 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1099972729, now seen corresponding path program 41 times [2021-07-13 20:09:27,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:27,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235648777] [2021-07-13 20:09:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:27,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:27,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235648777] [2021-07-13 20:09:27,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235648777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:27,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956422141] [2021-07-13 20:09:27,514 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 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 [2021-07-13 20:09:27,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:09:27,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:27,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:09:27,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:28,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:28,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:28,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:28,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:28,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:28,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:28,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:28,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:28,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956422141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:28,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:28,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-07-13 20:09:28,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836118259] [2021-07-13 20:09:28,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:09:28,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:09:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:09:28,135 INFO L87 Difference]: Start difference. First operand 3455 states and 8475 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:29,031 INFO L93 Difference]: Finished difference Result 5815 states and 14356 transitions. [2021-07-13 20:09:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:29,038 INFO L225 Difference]: With dead ends: 5815 [2021-07-13 20:09:29,038 INFO L226 Difference]: Without dead ends: 5463 [2021-07-13 20:09:29,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 993.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-07-13 20:09:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 3647. [2021-07-13 20:09:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 2.453922106417992) internal successors, (8947), 3646 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 8947 transitions. [2021-07-13 20:09:29,085 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 8947 transitions. Word has length 53 [2021-07-13 20:09:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:29,086 INFO L482 AbstractCegarLoop]: Abstraction has 3647 states and 8947 transitions. [2021-07-13 20:09:29,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 8947 transitions. [2021-07-13 20:09:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:29,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:29,090 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:29,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:09:29,301 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 435643001, now seen corresponding path program 42 times [2021-07-13 20:09:29,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:29,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279565043] [2021-07-13 20:09:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:09:29,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:29,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279565043] [2021-07-13 20:09:29,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279565043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:29,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304772466] [2021-07-13 20:09:29,541 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 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 [2021-07-13 20:09:29,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:09:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:30,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:30,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:30,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:30,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:30,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304772466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:30,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:30,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 21 [2021-07-13 20:09:30,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222523152] [2021-07-13 20:09:30,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:09:30,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:09:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:09:30,033 INFO L87 Difference]: Start difference. First operand 3647 states and 8947 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:30,774 INFO L93 Difference]: Finished difference Result 5723 states and 14082 transitions. [2021-07-13 20:09:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:30,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:30,782 INFO L225 Difference]: With dead ends: 5723 [2021-07-13 20:09:30,782 INFO L226 Difference]: Without dead ends: 5623 [2021-07-13 20:09:30,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 805.4ms TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5623 states. [2021-07-13 20:09:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5623 to 3775. [2021-07-13 20:09:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 3774 states have (on average 2.452835188129306) internal successors, (9257), 3774 states have internal predecessors, (9257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 9257 transitions. [2021-07-13 20:09:30,833 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 9257 transitions. Word has length 53 [2021-07-13 20:09:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:30,833 INFO L482 AbstractCegarLoop]: Abstraction has 3775 states and 9257 transitions. [2021-07-13 20:09:30,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 9257 transitions. [2021-07-13 20:09:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:30,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:30,837 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:31,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:09:31,041 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 188541561, now seen corresponding path program 43 times [2021-07-13 20:09:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538535612] [2021-07-13 20:09:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:31,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:31,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538535612] [2021-07-13 20:09:31,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538535612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:31,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258245973] [2021-07-13 20:09:31,293 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 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 [2021-07-13 20:09:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:31,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:31,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:31,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:31,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:31,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:31,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:31,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258245973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:31,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:31,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-07-13 20:09:31,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008365797] [2021-07-13 20:09:31,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:09:31,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:31,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:09:31,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:09:31,792 INFO L87 Difference]: Start difference. First operand 3775 states and 9257 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:32,678 INFO L93 Difference]: Finished difference Result 6759 states and 16692 transitions. [2021-07-13 20:09:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:32,688 INFO L225 Difference]: With dead ends: 6759 [2021-07-13 20:09:32,688 INFO L226 Difference]: Without dead ends: 6695 [2021-07-13 20:09:32,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:09:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6695 states. [2021-07-13 20:09:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6695 to 3759. [2021-07-13 20:09:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.452634379989356) internal successors, (9217), 3758 states have internal predecessors, (9217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9217 transitions. [2021-07-13 20:09:32,750 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9217 transitions. Word has length 53 [2021-07-13 20:09:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:32,750 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9217 transitions. [2021-07-13 20:09:32,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9217 transitions. [2021-07-13 20:09:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:32,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:32,756 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:32,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:09:32,973 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1784861305, now seen corresponding path program 44 times [2021-07-13 20:09:32,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:32,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630069487] [2021-07-13 20:09:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:09:33,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:33,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630069487] [2021-07-13 20:09:33,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630069487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:33,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061469018] [2021-07-13 20:09:33,225 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 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 [2021-07-13 20:09:33,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:33,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:33,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:33,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:33,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:33,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:33,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:33,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061469018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:33,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:33,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-07-13 20:09:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301791021] [2021-07-13 20:09:33,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:09:33,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:33,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:09:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:09:33,681 INFO L87 Difference]: Start difference. First operand 3759 states and 9217 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-07-13 20:09:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:35,004 INFO L93 Difference]: Finished difference Result 7151 states and 17562 transitions. [2021-07-13 20:09:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:09:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 53 [2021-07-13 20:09:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:35,015 INFO L225 Difference]: With dead ends: 7151 [2021-07-13 20:09:35,015 INFO L226 Difference]: Without dead ends: 6711 [2021-07-13 20:09:35,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1161.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:09:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6711 states. [2021-07-13 20:09:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6711 to 4175. [2021-07-13 20:09:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4175 states, 4174 states have (on average 2.4535218016291327) internal successors, (10241), 4174 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4175 states to 4175 states and 10241 transitions. [2021-07-13 20:09:35,071 INFO L78 Accepts]: Start accepts. Automaton has 4175 states and 10241 transitions. Word has length 53 [2021-07-13 20:09:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:35,071 INFO L482 AbstractCegarLoop]: Abstraction has 4175 states and 10241 transitions. [2021-07-13 20:09:35,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-07-13 20:09:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4175 states and 10241 transitions. [2021-07-13 20:09:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:35,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:35,075 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:35,276 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2081184377, now seen corresponding path program 45 times [2021-07-13 20:09:35,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:35,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592476435] [2021-07-13 20:09:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:09:35,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:35,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592476435] [2021-07-13 20:09:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592476435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:35,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132340273] [2021-07-13 20:09:35,526 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 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 [2021-07-13 20:09:35,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:09:35,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:35,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:35,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:35,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:35,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:35,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:35,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132340273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:35,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:35,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 20 [2021-07-13 20:09:35,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567487580] [2021-07-13 20:09:35,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:09:35,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:35,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:09:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:09:35,926 INFO L87 Difference]: Start difference. First operand 4175 states and 10241 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-07-13 20:09:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:36,667 INFO L93 Difference]: Finished difference Result 6651 states and 16395 transitions. [2021-07-13 20:09:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:09:36,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 53 [2021-07-13 20:09:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:36,676 INFO L225 Difference]: With dead ends: 6651 [2021-07-13 20:09:36,677 INFO L226 Difference]: Without dead ends: 6575 [2021-07-13 20:09:36,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-07-13 20:09:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 4335. [2021-07-13 20:09:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 4334 states have (on average 2.45523765574527) internal successors, (10641), 4334 states have internal predecessors, (10641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 10641 transitions. [2021-07-13 20:09:36,737 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 10641 transitions. Word has length 53 [2021-07-13 20:09:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:36,738 INFO L482 AbstractCegarLoop]: Abstraction has 4335 states and 10641 transitions. [2021-07-13 20:09:36,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-07-13 20:09:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 10641 transitions. [2021-07-13 20:09:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:36,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:36,742 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:36,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:36,943 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1415216007, now seen corresponding path program 46 times [2021-07-13 20:09:36,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:36,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264873481] [2021-07-13 20:09:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:37,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:37,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264873481] [2021-07-13 20:09:37,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264873481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:37,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228215638] [2021-07-13 20:09:37,178 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 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 [2021-07-13 20:09:37,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:37,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:37,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:37,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:37,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:37,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:37,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:37,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:37,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228215638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:37,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:37,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-07-13 20:09:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007729928] [2021-07-13 20:09:37,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:09:37,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:09:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:09:37,583 INFO L87 Difference]: Start difference. First operand 4335 states and 10641 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-07-13 20:09:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:38,483 INFO L93 Difference]: Finished difference Result 8163 states and 20066 transitions. [2021-07-13 20:09:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:09:38,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 53 [2021-07-13 20:09:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:38,494 INFO L225 Difference]: With dead ends: 8163 [2021-07-13 20:09:38,494 INFO L226 Difference]: Without dead ends: 7863 [2021-07-13 20:09:38,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:09:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7863 states. [2021-07-13 20:09:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7863 to 4847. [2021-07-13 20:09:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4847 states, 4846 states have (on average 2.4599669830788278) internal successors, (11921), 4846 states have internal predecessors, (11921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4847 states to 4847 states and 11921 transitions. [2021-07-13 20:09:38,565 INFO L78 Accepts]: Start accepts. Automaton has 4847 states and 11921 transitions. Word has length 53 [2021-07-13 20:09:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:38,565 INFO L482 AbstractCegarLoop]: Abstraction has 4847 states and 11921 transitions. [2021-07-13 20:09:38,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-07-13 20:09:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4847 states and 11921 transitions. [2021-07-13 20:09:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:38,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:38,570 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:38,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:09:38,770 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:38,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1662317447, now seen corresponding path program 47 times [2021-07-13 20:09:38,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:38,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097182508] [2021-07-13 20:09:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:39,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:39,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097182508] [2021-07-13 20:09:39,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097182508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:39,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929953368] [2021-07-13 20:09:39,014 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 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 [2021-07-13 20:09:39,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:09:39,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:39,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:39,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:39,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:39,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:39,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:39,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:39,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929953368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:39,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:39,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-07-13 20:09:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680560865] [2021-07-13 20:09:39,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:09:39,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:09:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:09:39,445 INFO L87 Difference]: Start difference. First operand 4847 states and 11921 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 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) [2021-07-13 20:09:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:40,189 INFO L93 Difference]: Finished difference Result 8775 states and 21889 transitions. [2021-07-13 20:09:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 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 53 [2021-07-13 20:09:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:40,202 INFO L225 Difference]: With dead ends: 8775 [2021-07-13 20:09:40,202 INFO L226 Difference]: Without dead ends: 8591 [2021-07-13 20:09:40,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:09:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-07-13 20:09:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 4927. [2021-07-13 20:09:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 4926 states have (on average 2.460617133576939) internal successors, (12121), 4926 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 12121 transitions. [2021-07-13 20:09:40,279 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 12121 transitions. Word has length 53 [2021-07-13 20:09:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:40,279 INFO L482 AbstractCegarLoop]: Abstraction has 4927 states and 12121 transitions. [2021-07-13 20:09:40,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 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) [2021-07-13 20:09:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 12121 transitions. [2021-07-13 20:09:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:40,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:40,284 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:40,485 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1503407737, now seen corresponding path program 48 times [2021-07-13 20:09:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988672454] [2021-07-13 20:09:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:40,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988672454] [2021-07-13 20:09:40,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988672454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223611523] [2021-07-13 20:09:40,737 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 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 [2021-07-13 20:09:40,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:09:40,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:09:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:41,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:41,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:41,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:41,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-07-13 20:09:41,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:41,323 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:09:41,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:41,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:123, output treesize:7 [2021-07-13 20:09:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:41,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223611523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:41,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:41,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 20 [2021-07-13 20:09:41,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65034224] [2021-07-13 20:09:41,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:09:41,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:41,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:09:41,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:09:41,335 INFO L87 Difference]: Start difference. First operand 4927 states and 12121 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-07-13 20:09:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:42,895 INFO L93 Difference]: Finished difference Result 8247 states and 20264 transitions. [2021-07-13 20:09:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:09:42,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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 53 [2021-07-13 20:09:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:42,907 INFO L225 Difference]: With dead ends: 8247 [2021-07-13 20:09:42,908 INFO L226 Difference]: Without dead ends: 7975 [2021-07-13 20:09:42,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1015.2ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7975 states. [2021-07-13 20:09:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7975 to 5487. [2021-07-13 20:09:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 2.461720743711265) internal successors, (13505), 5486 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 13505 transitions. [2021-07-13 20:09:42,993 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 13505 transitions. Word has length 53 [2021-07-13 20:09:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:42,993 INFO L482 AbstractCegarLoop]: Abstraction has 5487 states and 13505 transitions. [2021-07-13 20:09:42,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 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) [2021-07-13 20:09:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 13505 transitions. [2021-07-13 20:09:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:42,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:42,999 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:43,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:09:43,199 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:43,200 INFO L82 PathProgramCache]: Analyzing trace with hash -503319943, now seen corresponding path program 49 times [2021-07-13 20:09:43,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:43,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972094458] [2021-07-13 20:09:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:43,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972094458] [2021-07-13 20:09:43,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972094458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942849595] [2021-07-13 20:09:43,568 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 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 [2021-07-13 20:09:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:43,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:43,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:44,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:44,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:44,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:44,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:44,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:44,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:44,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:44,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942849595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:44,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:44,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-07-13 20:09:44,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143713222] [2021-07-13 20:09:44,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:09:44,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:09:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:09:44,098 INFO L87 Difference]: Start difference. First operand 5487 states and 13505 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-07-13 20:09:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:45,126 INFO L93 Difference]: Finished difference Result 10191 states and 25270 transitions. [2021-07-13 20:09:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:45,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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 53 [2021-07-13 20:09:45,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:45,146 INFO L225 Difference]: With dead ends: 10191 [2021-07-13 20:09:45,146 INFO L226 Difference]: Without dead ends: 10103 [2021-07-13 20:09:45,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1015.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:09:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10103 states. [2021-07-13 20:09:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10103 to 5455. [2021-07-13 20:09:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.4614961496149617) internal successors, (13425), 5454 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 13425 transitions. [2021-07-13 20:09:45,302 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 13425 transitions. Word has length 53 [2021-07-13 20:09:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:45,303 INFO L482 AbstractCegarLoop]: Abstraction has 5455 states and 13425 transitions. [2021-07-13 20:09:45,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 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) [2021-07-13 20:09:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 13425 transitions. [2021-07-13 20:09:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:45,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:45,310 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:45,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:09:45,512 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1256306297, now seen corresponding path program 50 times [2021-07-13 20:09:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:45,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569781010] [2021-07-13 20:09:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:45,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:45,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569781010] [2021-07-13 20:09:45,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569781010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:45,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579945094] [2021-07-13 20:09:45,952 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 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 [2021-07-13 20:09:45,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:45,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:46,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:46,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:46,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:46,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:46,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:46,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579945094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:46,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:46,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-07-13 20:09:46,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928069878] [2021-07-13 20:09:46,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:09:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:09:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:09:46,518 INFO L87 Difference]: Start difference. First operand 5455 states and 13425 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-07-13 20:09:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:47,584 INFO L93 Difference]: Finished difference Result 9127 states and 22633 transitions. [2021-07-13 20:09:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:47,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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 53 [2021-07-13 20:09:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:47,597 INFO L225 Difference]: With dead ends: 9127 [2021-07-13 20:09:47,597 INFO L226 Difference]: Without dead ends: 9039 [2021-07-13 20:09:47,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1100.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:09:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-13 20:09:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 5455. [2021-07-13 20:09:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.4614961496149617) internal successors, (13425), 5454 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 13425 transitions. [2021-07-13 20:09:47,696 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 13425 transitions. Word has length 53 [2021-07-13 20:09:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:47,696 INFO L482 AbstractCegarLoop]: Abstraction has 5455 states and 13425 transitions. [2021-07-13 20:09:47,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 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) [2021-07-13 20:09:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 13425 transitions. [2021-07-13 20:09:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:47,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:47,718 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:47,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:09:47,945 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1244538759, now seen corresponding path program 51 times [2021-07-13 20:09:47,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:47,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130452342] [2021-07-13 20:09:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:48,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130452342] [2021-07-13 20:09:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130452342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3134514] [2021-07-13 20:09:48,275 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 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 [2021-07-13 20:09:48,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:09:48,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:48,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:48,661 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-07-13 20:09:48,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:48,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:48,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:48,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:48,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-07-13 20:09:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:48,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3134514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:48,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-07-13 20:09:48,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594731511] [2021-07-13 20:09:48,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:09:48,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:09:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:09:48,682 INFO L87 Difference]: Start difference. First operand 5455 states and 13425 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:49,503 INFO L93 Difference]: Finished difference Result 7667 states and 18917 transitions. [2021-07-13 20:09:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:09:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 20:09:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:49,516 INFO L225 Difference]: With dead ends: 7667 [2021-07-13 20:09:49,516 INFO L226 Difference]: Without dead ends: 7631 [2021-07-13 20:09:49,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 878.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2021-07-13 20:09:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 5487. [2021-07-13 20:09:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 2.461720743711265) internal successors, (13505), 5486 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 13505 transitions. [2021-07-13 20:09:49,610 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 13505 transitions. Word has length 53 [2021-07-13 20:09:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:49,610 INFO L482 AbstractCegarLoop]: Abstraction has 5487 states and 13505 transitions. [2021-07-13 20:09:49,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 13505 transitions. [2021-07-13 20:09:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:49,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:49,617 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:49,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:09:49,840 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:49,840 INFO L82 PathProgramCache]: Analyzing trace with hash 75123451, now seen corresponding path program 52 times [2021-07-13 20:09:49,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:49,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133407447] [2021-07-13 20:09:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:49,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:49,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133407447] [2021-07-13 20:09:49,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133407447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:49,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862735730] [2021-07-13 20:09:49,975 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 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 [2021-07-13 20:09:50,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:09:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:50,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862735730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:50,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 20:09:50,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110536975] [2021-07-13 20:09:50,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:09:50,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:09:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:09:50,103 INFO L87 Difference]: Start difference. First operand 5487 states and 13505 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:50,154 INFO L93 Difference]: Finished difference Result 6987 states and 17110 transitions. [2021-07-13 20:09:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:09:50,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-13 20:09:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:50,164 INFO L225 Difference]: With dead ends: 6987 [2021-07-13 20:09:50,164 INFO L226 Difference]: Without dead ends: 6979 [2021-07-13 20:09:50,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:09:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-07-13 20:09:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 5711. [2021-07-13 20:09:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5710 states have (on average 2.4660245183887914) internal successors, (14081), 5710 states have internal predecessors, (14081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 14081 transitions. [2021-07-13 20:09:50,235 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 14081 transitions. Word has length 55 [2021-07-13 20:09:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:50,235 INFO L482 AbstractCegarLoop]: Abstraction has 5711 states and 14081 transitions. [2021-07-13 20:09:50,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 14081 transitions. [2021-07-13 20:09:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 20:09:50,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:50,241 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:50,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:50,442 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1670278101, now seen corresponding path program 53 times [2021-07-13 20:09:50,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:50,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754784576] [2021-07-13 20:09:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:50,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:50,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754784576] [2021-07-13 20:09:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754784576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042980503] [2021-07-13 20:09:50,659 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 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 [2021-07-13 20:09:50,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:09:50,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:09:50,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:51,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-13 20:09:51,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:51,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:51,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-13 20:09:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:51,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042980503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:51,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:51,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 22 [2021-07-13 20:09:51,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641581722] [2021-07-13 20:09:51,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:09:51,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:09:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:09:51,089 INFO L87 Difference]: Start difference. First operand 5711 states and 14081 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:52,507 INFO L93 Difference]: Finished difference Result 9803 states and 24338 transitions. [2021-07-13 20:09:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:09:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-13 20:09:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:52,521 INFO L225 Difference]: With dead ends: 9803 [2021-07-13 20:09:52,521 INFO L226 Difference]: Without dead ends: 9719 [2021-07-13 20:09:52,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1238.1ms TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:09:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9719 states. [2021-07-13 20:09:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9719 to 5615. [2021-07-13 20:09:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5615 states, 5614 states have (on average 2.4654435340220875) internal successors, (13841), 5614 states have internal predecessors, (13841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5615 states to 5615 states and 13841 transitions. [2021-07-13 20:09:52,607 INFO L78 Accepts]: Start accepts. Automaton has 5615 states and 13841 transitions. Word has length 57 [2021-07-13 20:09:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:52,607 INFO L482 AbstractCegarLoop]: Abstraction has 5615 states and 13841 transitions. [2021-07-13 20:09:52,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5615 states and 13841 transitions. [2021-07-13 20:09:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:09:52,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:52,613 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:52,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:09:52,814 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1390569303, now seen corresponding path program 54 times [2021-07-13 20:09:52,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:52,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221640996] [2021-07-13 20:09:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:53,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:53,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221640996] [2021-07-13 20:09:53,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221640996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527135000] [2021-07-13 20:09:53,075 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 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 [2021-07-13 20:09:53,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:09:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:09:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:53,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:53,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:53,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527135000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:53,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 20:09:53,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198883741] [2021-07-13 20:09:53,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:09:53,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:09:53,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:53,737 INFO L87 Difference]: Start difference. First operand 5615 states and 13841 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:54,936 INFO L93 Difference]: Finished difference Result 10807 states and 26817 transitions. [2021-07-13 20:09:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:09:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:54,953 INFO L225 Difference]: With dead ends: 10807 [2021-07-13 20:09:54,953 INFO L226 Difference]: Without dead ends: 10767 [2021-07-13 20:09:54,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1082.9ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:09:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-07-13 20:09:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 5679. [2021-07-13 20:09:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5679 states, 5678 states have (on average 2.4658330398027473) internal successors, (14001), 5678 states have internal predecessors, (14001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5679 states to 5679 states and 14001 transitions. [2021-07-13 20:09:55,055 INFO L78 Accepts]: Start accepts. Automaton has 5679 states and 14001 transitions. Word has length 59 [2021-07-13 20:09:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:55,055 INFO L482 AbstractCegarLoop]: Abstraction has 5679 states and 14001 transitions. [2021-07-13 20:09:55,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5679 states and 14001 transitions. [2021-07-13 20:09:55,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:09:55,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:55,061 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:55,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:55,262 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1034811049, now seen corresponding path program 55 times [2021-07-13 20:09:55,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:55,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686124820] [2021-07-13 20:09:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:55,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:55,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686124820] [2021-07-13 20:09:55,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686124820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:55,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059805916] [2021-07-13 20:09:55,570 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 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 [2021-07-13 20:09:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:09:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:56,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:56,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:56,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:56,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:56,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059805916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:56,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:56,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 20:09:56,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317018611] [2021-07-13 20:09:56,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:09:56,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:09:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:56,221 INFO L87 Difference]: Start difference. First operand 5679 states and 14001 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:57,262 INFO L93 Difference]: Finished difference Result 11111 states and 27625 transitions. [2021-07-13 20:09:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:57,262 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:09:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:57,278 INFO L225 Difference]: With dead ends: 11111 [2021-07-13 20:09:57,279 INFO L226 Difference]: Without dead ends: 11023 [2021-07-13 20:09:57,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1137.8ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:09:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11023 states. [2021-07-13 20:09:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11023 to 5775. [2021-07-13 20:09:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 2.463630065812262) internal successors, (14225), 5774 states have internal predecessors, (14225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 14225 transitions. [2021-07-13 20:09:57,404 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 14225 transitions. Word has length 59 [2021-07-13 20:09:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:57,404 INFO L482 AbstractCegarLoop]: Abstraction has 5775 states and 14225 transitions. [2021-07-13 20:09:57,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 14225 transitions. [2021-07-13 20:09:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:09:57,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:57,411 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:57,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:09:57,612 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash 823145303, now seen corresponding path program 56 times [2021-07-13 20:09:57,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:57,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482713899] [2021-07-13 20:09:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:57,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482713899] [2021-07-13 20:09:57,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482713899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469669269] [2021-07-13 20:09:57,872 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 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 [2021-07-13 20:09:57,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:57,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:09:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:58,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:58,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:09:58,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:58,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:58,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:58,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:09:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:58,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469669269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:58,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 20:09:58,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046903758] [2021-07-13 20:09:58,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:09:58,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:09:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:58,508 INFO L87 Difference]: Start difference. First operand 5775 states and 14225 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:59,847 INFO L93 Difference]: Finished difference Result 9879 states and 24481 transitions. [2021-07-13 20:09:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:09:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:59,860 INFO L225 Difference]: With dead ends: 9879 [2021-07-13 20:09:59,860 INFO L226 Difference]: Without dead ends: 9839 [2021-07-13 20:09:59,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1086.1ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:09:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9839 states. [2021-07-13 20:09:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9839 to 5807. [2021-07-13 20:09:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 2.4638305201515673) internal successors, (14305), 5806 states have internal predecessors, (14305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 14305 transitions. [2021-07-13 20:09:59,948 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 14305 transitions. Word has length 59 [2021-07-13 20:09:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:59,948 INFO L482 AbstractCegarLoop]: Abstraction has 5807 states and 14305 transitions. [2021-07-13 20:09:59,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 14305 transitions. [2021-07-13 20:09:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:09:59,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:59,955 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:00,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:00,156 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:00,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1909470551, now seen corresponding path program 57 times [2021-07-13 20:10:00,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:00,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950146177] [2021-07-13 20:10:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:00,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:00,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950146177] [2021-07-13 20:10:00,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950146177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:00,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503257124] [2021-07-13 20:10:00,384 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 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 [2021-07-13 20:10:00,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:10:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:00,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:00,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:00,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:00,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:01,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:01,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:01,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:01,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503257124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:01,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:01,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-07-13 20:10:01,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296314179] [2021-07-13 20:10:01,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:10:01,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:10:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:10:01,014 INFO L87 Difference]: Start difference. First operand 5807 states and 14305 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:02,790 INFO L93 Difference]: Finished difference Result 9031 states and 22247 transitions. [2021-07-13 20:10:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:10:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:02,803 INFO L225 Difference]: With dead ends: 9031 [2021-07-13 20:10:02,803 INFO L226 Difference]: Without dead ends: 8623 [2021-07-13 20:10:02,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1271.5ms TimeCoverageRelationStatistics Valid=301, Invalid=2351, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:10:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8623 states. [2021-07-13 20:10:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8623 to 6095. [2021-07-13 20:10:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6095 states, 6094 states have (on average 2.4616015753199867) internal successors, (15001), 6094 states have internal predecessors, (15001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 15001 transitions. [2021-07-13 20:10:02,891 INFO L78 Accepts]: Start accepts. Automaton has 6095 states and 15001 transitions. Word has length 59 [2021-07-13 20:10:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:02,891 INFO L482 AbstractCegarLoop]: Abstraction has 6095 states and 15001 transitions. [2021-07-13 20:10:02,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 6095 states and 15001 transitions. [2021-07-13 20:10:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:02,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:02,898 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:03,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:10:03,098 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash 832156503, now seen corresponding path program 58 times [2021-07-13 20:10:03,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:03,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102099165] [2021-07-13 20:10:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:03,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102099165] [2021-07-13 20:10:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102099165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636530648] [2021-07-13 20:10:03,397 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 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 [2021-07-13 20:10:03,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:03,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:03,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:04,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:04,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:04,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636530648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:04,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:04,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 20:10:04,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323805296] [2021-07-13 20:10:04,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:10:04,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:04,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:10:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:10:04,118 INFO L87 Difference]: Start difference. First operand 6095 states and 15001 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:05,511 INFO L93 Difference]: Finished difference Result 12839 states and 32095 transitions. [2021-07-13 20:10:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:10:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:05,532 INFO L225 Difference]: With dead ends: 12839 [2021-07-13 20:10:05,532 INFO L226 Difference]: Without dead ends: 12655 [2021-07-13 20:10:05,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1187.3ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:10:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12655 states. [2021-07-13 20:10:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12655 to 5359. [2021-07-13 20:10:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 2.4667786487495333) internal successors, (13217), 5358 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 13217 transitions. [2021-07-13 20:10:05,679 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 13217 transitions. Word has length 59 [2021-07-13 20:10:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:05,679 INFO L482 AbstractCegarLoop]: Abstraction has 5359 states and 13217 transitions. [2021-07-13 20:10:05,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 13217 transitions. [2021-07-13 20:10:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:05,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:05,685 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:05,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:05,885 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1604854441, now seen corresponding path program 59 times [2021-07-13 20:10:05,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:05,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160473825] [2021-07-13 20:10:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:06,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160473825] [2021-07-13 20:10:06,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160473825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785469871] [2021-07-13 20:10:06,169 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 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 [2021-07-13 20:10:06,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:10:06,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:06,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:10:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:06,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:06,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-07-13 20:10:06,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:06,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:06,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:06,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-07-13 20:10:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:06,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785469871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:06,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:06,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-07-13 20:10:06,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74031338] [2021-07-13 20:10:06,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:10:06,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:10:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:10:06,922 INFO L87 Difference]: Start difference. First operand 5359 states and 13217 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:09,514 INFO L93 Difference]: Finished difference Result 12591 states and 31245 transitions. [2021-07-13 20:10:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:09,514 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:09,533 INFO L225 Difference]: With dead ends: 12591 [2021-07-13 20:10:09,533 INFO L226 Difference]: Without dead ends: 12143 [2021-07-13 20:10:09,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1830.4ms TimeCoverageRelationStatistics Valid=292, Invalid=3014, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:10:09,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12143 states. [2021-07-13 20:10:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12143 to 6559. [2021-07-13 20:10:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 6558 states have (on average 2.466758157974992) internal successors, (16177), 6558 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 16177 transitions. [2021-07-13 20:10:09,654 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 16177 transitions. Word has length 59 [2021-07-13 20:10:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:09,655 INFO L482 AbstractCegarLoop]: Abstraction has 6559 states and 16177 transitions. [2021-07-13 20:10:09,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 16177 transitions. [2021-07-13 20:10:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:09,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:09,664 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:09,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:10:09,888 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1977286825, now seen corresponding path program 60 times [2021-07-13 20:10:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:09,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162643516] [2021-07-13 20:10:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:10,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:10,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162643516] [2021-07-13 20:10:10,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162643516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015784645] [2021-07-13 20:10:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:10:10,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:10:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:10:10,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:11,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:11,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:11,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:11,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 48 [2021-07-13 20:10:11,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:11,134 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:10:11,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:11,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:142, output treesize:7 [2021-07-13 20:10:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:11,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015784645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:11,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:11,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 20:10:11,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148069132] [2021-07-13 20:10:11,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:11,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:11,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:11,147 INFO L87 Difference]: Start difference. First operand 6559 states and 16177 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:15,166 INFO L93 Difference]: Finished difference Result 12419 states and 30851 transitions. [2021-07-13 20:10:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:10:15,166 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:15,184 INFO L225 Difference]: With dead ends: 12419 [2021-07-13 20:10:15,184 INFO L226 Difference]: Without dead ends: 11983 [2021-07-13 20:10:15,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1907.7ms TimeCoverageRelationStatistics Valid=286, Invalid=2684, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:10:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11983 states. [2021-07-13 20:10:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11983 to 6495. [2021-07-13 20:10:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6495 states, 6494 states have (on average 2.4701262704034495) internal successors, (16041), 6494 states have internal predecessors, (16041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6495 states to 6495 states and 16041 transitions. [2021-07-13 20:10:15,305 INFO L78 Accepts]: Start accepts. Automaton has 6495 states and 16041 transitions. Word has length 59 [2021-07-13 20:10:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:15,305 INFO L482 AbstractCegarLoop]: Abstraction has 6495 states and 16041 transitions. [2021-07-13 20:10:15,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6495 states and 16041 transitions. [2021-07-13 20:10:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:15,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:15,311 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:15,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:15,512 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:15,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1613808297, now seen corresponding path program 61 times [2021-07-13 20:10:15,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:15,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038411086] [2021-07-13 20:10:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:15,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:15,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038411086] [2021-07-13 20:10:15,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038411086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:15,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161298475] [2021-07-13 20:10:15,813 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 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 [2021-07-13 20:10:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:16,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:16,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:16,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:16,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:16,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:16,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:16,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:16,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:16,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161298475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:16,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:16,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 20:10:16,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614269745] [2021-07-13 20:10:16,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:16,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:16,432 INFO L87 Difference]: Start difference. First operand 6495 states and 16041 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:17,802 INFO L93 Difference]: Finished difference Result 10055 states and 24851 transitions. [2021-07-13 20:10:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:10:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:17,817 INFO L225 Difference]: With dead ends: 10055 [2021-07-13 20:10:17,817 INFO L226 Difference]: Without dead ends: 9695 [2021-07-13 20:10:17,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1339.0ms TimeCoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:10:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9695 states. [2021-07-13 20:10:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9695 to 7343. [2021-07-13 20:10:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 7342 states have (on average 2.4648597112503405) internal successors, (18097), 7342 states have internal predecessors, (18097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 18097 transitions. [2021-07-13 20:10:17,931 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 18097 transitions. Word has length 59 [2021-07-13 20:10:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:17,931 INFO L482 AbstractCegarLoop]: Abstraction has 7343 states and 18097 transitions. [2021-07-13 20:10:17,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 18097 transitions. [2021-07-13 20:10:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:17,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:17,940 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:18,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:10:18,141 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1172638039, now seen corresponding path program 62 times [2021-07-13 20:10:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:18,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085765871] [2021-07-13 20:10:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 20:10:18,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:18,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085765871] [2021-07-13 20:10:18,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085765871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271769895] [2021-07-13 20:10:18,406 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 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 [2021-07-13 20:10:18,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:18,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:19,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:19,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:19,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:19,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:19,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:19,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:19,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271769895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:19,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:19,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-07-13 20:10:19,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509350691] [2021-07-13 20:10:19,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:10:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:10:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:10:19,104 INFO L87 Difference]: Start difference. First operand 7343 states and 18097 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:20,720 INFO L93 Difference]: Finished difference Result 11835 states and 29279 transitions. [2021-07-13 20:10:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:20,738 INFO L225 Difference]: With dead ends: 11835 [2021-07-13 20:10:20,738 INFO L226 Difference]: Without dead ends: 11391 [2021-07-13 20:10:20,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1406.1ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:10:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-07-13 20:10:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 6767. [2021-07-13 20:10:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 2.4665976943541237) internal successors, (16689), 6766 states have internal predecessors, (16689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 16689 transitions. [2021-07-13 20:10:20,900 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 16689 transitions. Word has length 59 [2021-07-13 20:10:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:20,900 INFO L482 AbstractCegarLoop]: Abstraction has 6767 states and 16689 transitions. [2021-07-13 20:10:20,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 16689 transitions. [2021-07-13 20:10:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:20,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:20,908 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:21,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:10:21,108 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:21,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2049900887, now seen corresponding path program 63 times [2021-07-13 20:10:21,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:21,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401263129] [2021-07-13 20:10:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:21,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:21,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401263129] [2021-07-13 20:10:21,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401263129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:21,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319633758] [2021-07-13 20:10:21,380 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 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 [2021-07-13 20:10:21,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:10:21,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:21,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:21,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:22,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:22,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:22,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319633758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:22,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:22,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 20:10:22,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260166356] [2021-07-13 20:10:22,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:10:22,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:22,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:10:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:10:22,014 INFO L87 Difference]: Start difference. First operand 6767 states and 16689 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:23,595 INFO L93 Difference]: Finished difference Result 10007 states and 24673 transitions. [2021-07-13 20:10:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:10:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:23,611 INFO L225 Difference]: With dead ends: 10007 [2021-07-13 20:10:23,611 INFO L226 Difference]: Without dead ends: 9615 [2021-07-13 20:10:23,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1306.6ms TimeCoverageRelationStatistics Valid=287, Invalid=2365, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:10:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-07-13 20:10:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7087. [2021-07-13 20:10:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 2.463590177815411) internal successors, (17457), 7086 states have internal predecessors, (17457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 17457 transitions. [2021-07-13 20:10:23,718 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 17457 transitions. Word has length 59 [2021-07-13 20:10:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:23,719 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 17457 transitions. [2021-07-13 20:10:23,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 17457 transitions. [2021-07-13 20:10:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:23,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:23,725 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:23,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:10:23,926 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1464424105, now seen corresponding path program 64 times [2021-07-13 20:10:23,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:23,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236207654] [2021-07-13 20:10:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:24,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:24,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236207654] [2021-07-13 20:10:24,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236207654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:24,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940289151] [2021-07-13 20:10:24,231 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 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 [2021-07-13 20:10:24,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:24,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:24,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:24,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:24,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:24,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:24,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:24,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:24,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:24,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:24,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:24,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940289151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:24,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:24,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 20:10:24,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597446291] [2021-07-13 20:10:24,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:24,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:24,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:24,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:24,906 INFO L87 Difference]: Start difference. First operand 7087 states and 17457 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:25,876 INFO L93 Difference]: Finished difference Result 11831 states and 29545 transitions. [2021-07-13 20:10:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:10:25,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:25,894 INFO L225 Difference]: With dead ends: 11831 [2021-07-13 20:10:25,894 INFO L226 Difference]: Without dead ends: 11647 [2021-07-13 20:10:25,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1111.9ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:10:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11647 states. [2021-07-13 20:10:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11647 to 7119. [2021-07-13 20:10:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7119 states, 7118 states have (on average 2.4637538634447878) internal successors, (17537), 7118 states have internal predecessors, (17537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7119 states to 7119 states and 17537 transitions. [2021-07-13 20:10:26,016 INFO L78 Accepts]: Start accepts. Automaton has 7119 states and 17537 transitions. Word has length 59 [2021-07-13 20:10:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:26,016 INFO L482 AbstractCegarLoop]: Abstraction has 7119 states and 17537 transitions. [2021-07-13 20:10:26,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7119 states and 17537 transitions. [2021-07-13 20:10:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:26,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:26,022 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:26,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:26,223 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:26,223 INFO L82 PathProgramCache]: Analyzing trace with hash -868342953, now seen corresponding path program 65 times [2021-07-13 20:10:26,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:26,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231416298] [2021-07-13 20:10:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:26,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:26,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231416298] [2021-07-13 20:10:26,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231416298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:26,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116977305] [2021-07-13 20:10:26,521 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 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 [2021-07-13 20:10:26,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:10:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:26,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:26,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:27,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:27,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:27,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:27,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:27,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:27,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:27,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116977305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:27,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:27,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 20:10:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059381903] [2021-07-13 20:10:27,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:10:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:27,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:10:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:10:27,186 INFO L87 Difference]: Start difference. First operand 7119 states and 17537 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:28,246 INFO L93 Difference]: Finished difference Result 10663 states and 26371 transitions. [2021-07-13 20:10:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:10:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:28,261 INFO L225 Difference]: With dead ends: 10663 [2021-07-13 20:10:28,261 INFO L226 Difference]: Without dead ends: 10335 [2021-07-13 20:10:28,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1205.1ms TimeCoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:10:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10335 states. [2021-07-13 20:10:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10335 to 7583. [2021-07-13 20:10:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7583 states, 7582 states have (on average 2.4638617778950147) internal successors, (18681), 7582 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7583 states to 7583 states and 18681 transitions. [2021-07-13 20:10:28,370 INFO L78 Accepts]: Start accepts. Automaton has 7583 states and 18681 transitions. Word has length 59 [2021-07-13 20:10:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:28,370 INFO L482 AbstractCegarLoop]: Abstraction has 7583 states and 18681 transitions. [2021-07-13 20:10:28,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7583 states and 18681 transitions. [2021-07-13 20:10:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:28,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:28,378 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:28,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:28,579 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:28,579 INFO L82 PathProgramCache]: Analyzing trace with hash 264697687, now seen corresponding path program 66 times [2021-07-13 20:10:28,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:28,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303321651] [2021-07-13 20:10:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:28,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303321651] [2021-07-13 20:10:28,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303321651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327089923] [2021-07-13 20:10:28,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:28,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:10:28,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:29,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:29,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:29,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:29,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 48 [2021-07-13 20:10:29,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:29,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:29,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:29,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:137, output treesize:7 [2021-07-13 20:10:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:29,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327089923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:29,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:29,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-13 20:10:29,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6130596] [2021-07-13 20:10:29,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:29,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:29,850 INFO L87 Difference]: Start difference. First operand 7583 states and 18681 transitions. Second operand has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:36,979 INFO L93 Difference]: Finished difference Result 14399 states and 35669 transitions. [2021-07-13 20:10:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:10:36,979 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:37,001 INFO L225 Difference]: With dead ends: 14399 [2021-07-13 20:10:37,001 INFO L226 Difference]: Without dead ends: 13951 [2021-07-13 20:10:37,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 2889.3ms TimeCoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:10:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2021-07-13 20:10:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 7711. [2021-07-13 20:10:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7711 states, 7710 states have (on average 2.461348897535668) internal successors, (18977), 7710 states have internal predecessors, (18977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7711 states to 7711 states and 18977 transitions. [2021-07-13 20:10:37,131 INFO L78 Accepts]: Start accepts. Automaton has 7711 states and 18977 transitions. Word has length 59 [2021-07-13 20:10:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:37,131 INFO L482 AbstractCegarLoop]: Abstraction has 7711 states and 18977 transitions. [2021-07-13 20:10:37,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7711 states and 18977 transitions. [2021-07-13 20:10:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:37,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:37,139 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:37,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:37,340 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash -87700649, now seen corresponding path program 67 times [2021-07-13 20:10:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:37,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495751958] [2021-07-13 20:10:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:37,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495751958] [2021-07-13 20:10:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495751958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565824268] [2021-07-13 20:10:37,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:37,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:38,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:38,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:38,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:38,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:38,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:38,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:38,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:38,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:38,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565824268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:38,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:38,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 20:10:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175340887] [2021-07-13 20:10:38,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:38,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:38,417 INFO L87 Difference]: Start difference. First operand 7711 states and 18977 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:39,413 INFO L93 Difference]: Finished difference Result 12279 states and 30489 transitions. [2021-07-13 20:10:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:10:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:39,433 INFO L225 Difference]: With dead ends: 12279 [2021-07-13 20:10:39,433 INFO L226 Difference]: Without dead ends: 12191 [2021-07-13 20:10:39,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1150.3ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:10:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12191 states. [2021-07-13 20:10:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12191 to 7743. [2021-07-13 20:10:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7743 states, 7742 states have (on average 2.461508654094549) internal successors, (19057), 7742 states have internal predecessors, (19057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 19057 transitions. [2021-07-13 20:10:39,562 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 19057 transitions. Word has length 59 [2021-07-13 20:10:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:39,562 INFO L482 AbstractCegarLoop]: Abstraction has 7743 states and 19057 transitions. [2021-07-13 20:10:39,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 19057 transitions. [2021-07-13 20:10:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:39,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:39,570 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:39,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:10:39,771 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:39,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1298041513, now seen corresponding path program 68 times [2021-07-13 20:10:39,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:39,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436464800] [2021-07-13 20:10:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:40,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436464800] [2021-07-13 20:10:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436464800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779283039] [2021-07-13 20:10:40,164 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 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 [2021-07-13 20:10:40,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:40,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:40,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:40,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:40,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:40,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:40,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:40,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:10:40,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:40,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:40,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:40,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:10:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:40,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779283039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:40,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:40,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 20:10:40,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102820118] [2021-07-13 20:10:40,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:40,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:40,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:40,942 INFO L87 Difference]: Start difference. First operand 7743 states and 19057 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:42,090 INFO L93 Difference]: Finished difference Result 10551 states and 26097 transitions. [2021-07-13 20:10:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:10:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:10:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:42,106 INFO L225 Difference]: With dead ends: 10551 [2021-07-13 20:10:42,106 INFO L226 Difference]: Without dead ends: 10511 [2021-07-13 20:10:42,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1202.8ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:10:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10511 states. [2021-07-13 20:10:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10511 to 7759. [2021-07-13 20:10:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7759 states, 7758 states have (on average 2.4615880381541633) internal successors, (19097), 7758 states have internal predecessors, (19097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 19097 transitions. [2021-07-13 20:10:42,222 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 19097 transitions. Word has length 59 [2021-07-13 20:10:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:42,222 INFO L482 AbstractCegarLoop]: Abstraction has 7759 states and 19097 transitions. [2021-07-13 20:10:42,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 19097 transitions. [2021-07-13 20:10:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:42,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:42,231 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:42,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:42,431 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:42,432 INFO L82 PathProgramCache]: Analyzing trace with hash -704558249, now seen corresponding path program 69 times [2021-07-13 20:10:42,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:42,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070315337] [2021-07-13 20:10:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:42,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:42,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070315337] [2021-07-13 20:10:42,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070315337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:42,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207354050] [2021-07-13 20:10:42,722 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 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 [2021-07-13 20:10:42,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:10:42,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:10:42,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:43,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:43,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:43,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 48 [2021-07-13 20:10:43,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:43,886 INFO L628 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2021-07-13 20:10:43,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:43,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:150, output treesize:7 [2021-07-13 20:10:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:43,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207354050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:43,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:43,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 20:10:43,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904115675] [2021-07-13 20:10:43,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:10:43,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:10:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:10:43,904 INFO L87 Difference]: Start difference. First operand 7759 states and 19097 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:47,103 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-13 20:10:48,888 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-07-13 20:10:50,671 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-07-13 20:10:53,224 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-07-13 20:11:03,287 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-07-13 20:11:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:07,788 INFO L93 Difference]: Finished difference Result 19539 states and 48285 transitions. [2021-07-13 20:11:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:11:07,789 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:07,818 INFO L225 Difference]: With dead ends: 19539 [2021-07-13 20:11:07,818 INFO L226 Difference]: Without dead ends: 18831 [2021-07-13 20:11:07,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 9587.2ms TimeCoverageRelationStatistics Valid=456, Invalid=4656, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:11:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18831 states. [2021-07-13 20:11:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18831 to 7551. [2021-07-13 20:11:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7551 states, 7550 states have (on average 2.463708609271523) internal successors, (18601), 7550 states have internal predecessors, (18601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 18601 transitions. [2021-07-13 20:11:08,015 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 18601 transitions. Word has length 59 [2021-07-13 20:11:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:08,015 INFO L482 AbstractCegarLoop]: Abstraction has 7551 states and 18601 transitions. [2021-07-13 20:11:08,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 18601 transitions. [2021-07-13 20:11:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:08,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:08,022 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:08,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:08,222 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash 672165207, now seen corresponding path program 70 times [2021-07-13 20:11:08,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:08,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027894380] [2021-07-13 20:11:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:08,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027894380] [2021-07-13 20:11:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027894380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082421036] [2021-07-13 20:11:08,577 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 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 [2021-07-13 20:11:08,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:08,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:09,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:09,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:09,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:09,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:09,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:09,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:09,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082421036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:09,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:09,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 20:11:09,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047634553] [2021-07-13 20:11:09,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:11:09,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:09,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:11:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:11:09,223 INFO L87 Difference]: Start difference. First operand 7551 states and 18601 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:10,753 INFO L93 Difference]: Finished difference Result 14343 states and 35633 transitions. [2021-07-13 20:11:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:11:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:10,776 INFO L225 Difference]: With dead ends: 14343 [2021-07-13 20:11:10,776 INFO L226 Difference]: Without dead ends: 14255 [2021-07-13 20:11:10,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1338.4ms TimeCoverageRelationStatistics Valid=322, Invalid=2870, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:11:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2021-07-13 20:11:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 7743. [2021-07-13 20:11:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7743 states, 7742 states have (on average 2.4604753293722554) internal successors, (19049), 7742 states have internal predecessors, (19049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 19049 transitions. [2021-07-13 20:11:10,912 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 19049 transitions. Word has length 59 [2021-07-13 20:11:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:10,912 INFO L482 AbstractCegarLoop]: Abstraction has 7743 states and 19049 transitions. [2021-07-13 20:11:10,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 19049 transitions. [2021-07-13 20:11:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:10,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:10,918 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:11,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:11,119 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash -538175657, now seen corresponding path program 71 times [2021-07-13 20:11:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:11,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662962600] [2021-07-13 20:11:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:11,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662962600] [2021-07-13 20:11:11,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662962600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733625408] [2021-07-13 20:11:11,510 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 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 [2021-07-13 20:11:11,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:11:11,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:11,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-13 20:11:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:12,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:12,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:12,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:12,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:12,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:12,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733625408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:12,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:12,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 20:11:12,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121178916] [2021-07-13 20:11:12,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:11:12,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:12,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:11:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:11:12,227 INFO L87 Difference]: Start difference. First operand 7743 states and 19049 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:14,012 INFO L93 Difference]: Finished difference Result 13935 states and 34589 transitions. [2021-07-13 20:11:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:11:14,013 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:14,031 INFO L225 Difference]: With dead ends: 13935 [2021-07-13 20:11:14,031 INFO L226 Difference]: Without dead ends: 13439 [2021-07-13 20:11:14,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1386.2ms TimeCoverageRelationStatistics Valid=328, Invalid=2864, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:11:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2021-07-13 20:11:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 8063. [2021-07-13 20:11:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8063 states, 8062 states have (on average 2.4620441577772265) internal successors, (19849), 8062 states have internal predecessors, (19849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8063 states to 8063 states and 19849 transitions. [2021-07-13 20:11:14,165 INFO L78 Accepts]: Start accepts. Automaton has 8063 states and 19849 transitions. Word has length 59 [2021-07-13 20:11:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:14,166 INFO L482 AbstractCegarLoop]: Abstraction has 8063 states and 19849 transitions. [2021-07-13 20:11:14,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8063 states and 19849 transitions. [2021-07-13 20:11:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:14,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:14,172 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:14,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:11:14,373 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1248989353, now seen corresponding path program 72 times [2021-07-13 20:11:14,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:14,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073644638] [2021-07-13 20:11:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:14,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:14,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073644638] [2021-07-13 20:11:14,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073644638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:14,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733760822] [2021-07-13 20:11:14,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:14,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:11:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:15,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:15,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:15,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:15,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:15,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:15,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:15,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733760822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:15,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:15,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-13 20:11:15,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7229269] [2021-07-13 20:11:15,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:11:15,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:15,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:11:15,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:11:15,405 INFO L87 Difference]: Start difference. First operand 8063 states and 19849 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:17,140 INFO L93 Difference]: Finished difference Result 12375 states and 30459 transitions. [2021-07-13 20:11:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:11:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:17,157 INFO L225 Difference]: With dead ends: 12375 [2021-07-13 20:11:17,157 INFO L226 Difference]: Without dead ends: 11919 [2021-07-13 20:11:17,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1541.0ms TimeCoverageRelationStatistics Valid=297, Invalid=2565, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:11:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11919 states. [2021-07-13 20:11:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11919 to 9231. [2021-07-13 20:11:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9231 states, 9230 states have (on average 2.459913326110509) internal successors, (22705), 9230 states have internal predecessors, (22705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9231 states to 9231 states and 22705 transitions. [2021-07-13 20:11:17,299 INFO L78 Accepts]: Start accepts. Automaton has 9231 states and 22705 transitions. Word has length 59 [2021-07-13 20:11:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:17,299 INFO L482 AbstractCegarLoop]: Abstraction has 9231 states and 22705 transitions. [2021-07-13 20:11:17,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9231 states and 22705 transitions. [2021-07-13 20:11:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:17,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:17,308 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:17,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:17,508 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash -468347049, now seen corresponding path program 73 times [2021-07-13 20:11:17,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:17,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629971446] [2021-07-13 20:11:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:17,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:17,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629971446] [2021-07-13 20:11:17,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629971446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:17,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898222522] [2021-07-13 20:11:17,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:18,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:18,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:18,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:18,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:18,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:18,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:18,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:18,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:18,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898222522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:18,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:18,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 20:11:18,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52938712] [2021-07-13 20:11:18,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:11:18,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:11:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:11:18,607 INFO L87 Difference]: Start difference. First operand 9231 states and 22705 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:19,907 INFO L93 Difference]: Finished difference Result 15815 states and 39361 transitions. [2021-07-13 20:11:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:11:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:19,933 INFO L225 Difference]: With dead ends: 15815 [2021-07-13 20:11:19,933 INFO L226 Difference]: Without dead ends: 15631 [2021-07-13 20:11:19,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1241.1ms TimeCoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:11:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2021-07-13 20:11:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 9551. [2021-07-13 20:11:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9551 states, 9550 states have (on average 2.4612565445026178) internal successors, (23505), 9550 states have internal predecessors, (23505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9551 states to 9551 states and 23505 transitions. [2021-07-13 20:11:20,119 INFO L78 Accepts]: Start accepts. Automaton has 9551 states and 23505 transitions. Word has length 59 [2021-07-13 20:11:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:20,119 INFO L482 AbstractCegarLoop]: Abstraction has 9551 states and 23505 transitions. [2021-07-13 20:11:20,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9551 states and 23505 transitions. [2021-07-13 20:11:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:20,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:20,128 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:20,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:11:20,329 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1678687913, now seen corresponding path program 74 times [2021-07-13 20:11:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:20,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715196879] [2021-07-13 20:11:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:20,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:20,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715196879] [2021-07-13 20:11:20,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715196879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:20,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064571727] [2021-07-13 20:11:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:11:20,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:20,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:21,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:21,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:21,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:21,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:21,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:21,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:21,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:21,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:21,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:21,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064571727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:21,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:21,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 20:11:21,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549861192] [2021-07-13 20:11:21,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:11:21,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:21,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:11:21,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:11:21,253 INFO L87 Difference]: Start difference. First operand 9551 states and 23505 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:22,286 INFO L93 Difference]: Finished difference Result 12711 states and 31401 transitions. [2021-07-13 20:11:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:11:22,286 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:22,305 INFO L225 Difference]: With dead ends: 12711 [2021-07-13 20:11:22,305 INFO L226 Difference]: Without dead ends: 12671 [2021-07-13 20:11:22,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=247, Invalid=2009, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:11:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12671 states. [2021-07-13 20:11:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12671 to 9567. [2021-07-13 20:11:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9567 states, 9566 states have (on average 2.461321346435292) internal successors, (23545), 9566 states have internal predecessors, (23545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9567 states to 9567 states and 23545 transitions. [2021-07-13 20:11:22,452 INFO L78 Accepts]: Start accepts. Automaton has 9567 states and 23545 transitions. Word has length 59 [2021-07-13 20:11:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:22,452 INFO L482 AbstractCegarLoop]: Abstraction has 9567 states and 23545 transitions. [2021-07-13 20:11:22,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9567 states and 23545 transitions. [2021-07-13 20:11:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:22,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:22,461 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:22,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:22,662 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:22,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1191043927, now seen corresponding path program 75 times [2021-07-13 20:11:22,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:22,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095816707] [2021-07-13 20:11:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:22,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:22,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095816707] [2021-07-13 20:11:22,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095816707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:22,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111448704] [2021-07-13 20:11:22,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:23,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:11:23,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:23,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:23,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:23,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:23,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:23,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:23,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:23,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:23,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:23,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:23,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111448704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:23,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:23,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-07-13 20:11:23,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898696802] [2021-07-13 20:11:23,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:11:23,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:11:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:11:23,645 INFO L87 Difference]: Start difference. First operand 9567 states and 23545 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:24,955 INFO L93 Difference]: Finished difference Result 15167 states and 37549 transitions. [2021-07-13 20:11:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:11:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:24,978 INFO L225 Difference]: With dead ends: 15167 [2021-07-13 20:11:24,978 INFO L226 Difference]: Without dead ends: 15103 [2021-07-13 20:11:24,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1125.7ms TimeCoverageRelationStatistics Valid=262, Invalid=2090, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:11:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-07-13 20:11:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 9711. [2021-07-13 20:11:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9711 states, 9710 states have (on average 2.461894953656025) internal successors, (23905), 9710 states have internal predecessors, (23905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9711 states to 9711 states and 23905 transitions. [2021-07-13 20:11:25,136 INFO L78 Accepts]: Start accepts. Automaton has 9711 states and 23905 transitions. Word has length 59 [2021-07-13 20:11:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:25,136 INFO L482 AbstractCegarLoop]: Abstraction has 9711 states and 23905 transitions. [2021-07-13 20:11:25,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 9711 states and 23905 transitions. [2021-07-13 20:11:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:25,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:25,144 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:25,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:25,345 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1469435049, now seen corresponding path program 76 times [2021-07-13 20:11:25,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:25,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711168169] [2021-07-13 20:11:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:25,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:25,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711168169] [2021-07-13 20:11:25,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711168169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:25,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133930678] [2021-07-13 20:11:25,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:25,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:25,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:26,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:26,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:26,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:26,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:26,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:26,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:26,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133930678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:26,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:26,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-07-13 20:11:26,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116679285] [2021-07-13 20:11:26,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:11:26,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:11:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:11:26,207 INFO L87 Difference]: Start difference. First operand 9711 states and 23905 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:27,731 INFO L93 Difference]: Finished difference Result 13955 states and 34295 transitions. [2021-07-13 20:11:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:11:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:27,749 INFO L225 Difference]: With dead ends: 13955 [2021-07-13 20:11:27,749 INFO L226 Difference]: Without dead ends: 13551 [2021-07-13 20:11:27,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1331.2ms TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:11:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13551 states. [2021-07-13 20:11:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13551 to 10239. [2021-07-13 20:11:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 2.4601484664973627) internal successors, (25187), 10238 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 25187 transitions. [2021-07-13 20:11:27,890 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 25187 transitions. Word has length 59 [2021-07-13 20:11:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:27,890 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 25187 transitions. [2021-07-13 20:11:27,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 25187 transitions. [2021-07-13 20:11:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:27,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:27,898 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:28,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:28,099 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1609234263, now seen corresponding path program 77 times [2021-07-13 20:11:28,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:28,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423407352] [2021-07-13 20:11:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:28,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:28,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423407352] [2021-07-13 20:11:28,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423407352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:28,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544439409] [2021-07-13 20:11:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:28,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:11:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:28,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:28,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:28,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:28,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:28,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:28,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:28,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544439409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:28,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:28,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-07-13 20:11:28,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187592262] [2021-07-13 20:11:28,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:11:28,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:28,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:11:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:11:28,973 INFO L87 Difference]: Start difference. First operand 10239 states and 25187 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:30,540 INFO L93 Difference]: Finished difference Result 13031 states and 32033 transitions. [2021-07-13 20:11:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:11:30,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:30,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:30,561 INFO L225 Difference]: With dead ends: 13031 [2021-07-13 20:11:30,561 INFO L226 Difference]: Without dead ends: 12591 [2021-07-13 20:11:30,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1436.4ms TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:11:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-07-13 20:11:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 9871. [2021-07-13 20:11:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 2.461094224924012) internal successors, (24291), 9870 states have internal predecessors, (24291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 24291 transitions. [2021-07-13 20:11:30,714 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 24291 transitions. Word has length 59 [2021-07-13 20:11:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:30,714 INFO L482 AbstractCegarLoop]: Abstraction has 9871 states and 24291 transitions. [2021-07-13 20:11:30,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 24291 transitions. [2021-07-13 20:11:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:30,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:30,722 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:30,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:30,923 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash 560577367, now seen corresponding path program 78 times [2021-07-13 20:11:30,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:30,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159726125] [2021-07-13 20:11:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:31,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:31,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159726125] [2021-07-13 20:11:31,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159726125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:31,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156757420] [2021-07-13 20:11:31,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:31,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:11:31,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:31,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-13 20:11:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:31,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:31,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:31,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:31,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:31,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:31,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:31,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:31,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156757420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:31,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:31,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-07-13 20:11:31,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965574582] [2021-07-13 20:11:31,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:11:31,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:31,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:11:31,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:11:31,889 INFO L87 Difference]: Start difference. First operand 9871 states and 24291 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:32,932 INFO L93 Difference]: Finished difference Result 14911 states and 36717 transitions. [2021-07-13 20:11:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:11:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:32,955 INFO L225 Difference]: With dead ends: 14911 [2021-07-13 20:11:32,955 INFO L226 Difference]: Without dead ends: 14559 [2021-07-13 20:11:32,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1192.1ms TimeCoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:11:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14559 states. [2021-07-13 20:11:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14559 to 11871. [2021-07-13 20:11:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11871 states, 11870 states have (on average 2.458887952822241) internal successors, (29187), 11870 states have internal predecessors, (29187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11871 states to 11871 states and 29187 transitions. [2021-07-13 20:11:33,156 INFO L78 Accepts]: Start accepts. Automaton has 11871 states and 29187 transitions. Word has length 59 [2021-07-13 20:11:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:33,156 INFO L482 AbstractCegarLoop]: Abstraction has 11871 states and 29187 transitions. [2021-07-13 20:11:33,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 11871 states and 29187 transitions. [2021-07-13 20:11:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:33,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:33,167 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:33,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:33,369 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1552901463, now seen corresponding path program 79 times [2021-07-13 20:11:33,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:33,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16817019] [2021-07-13 20:11:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:33,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:33,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16817019] [2021-07-13 20:11:33,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16817019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:33,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641140429] [2021-07-13 20:11:33,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:33,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:33,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:34,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:34,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:34,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:34,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:34,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:34,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:34,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641140429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:34,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:34,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-07-13 20:11:34,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672765568] [2021-07-13 20:11:34,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:11:34,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:11:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:11:34,195 INFO L87 Difference]: Start difference. First operand 11871 states and 29187 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:35,397 INFO L93 Difference]: Finished difference Result 18871 states and 46707 transitions. [2021-07-13 20:11:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:11:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:35,428 INFO L225 Difference]: With dead ends: 18871 [2021-07-13 20:11:35,428 INFO L226 Difference]: Without dead ends: 18783 [2021-07-13 20:11:35,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:11:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18783 states. [2021-07-13 20:11:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18783 to 11535. [2021-07-13 20:11:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11535 states, 11534 states have (on average 2.4576903069186753) internal successors, (28347), 11534 states have internal predecessors, (28347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11535 states to 11535 states and 28347 transitions. [2021-07-13 20:11:35,635 INFO L78 Accepts]: Start accepts. Automaton has 11535 states and 28347 transitions. Word has length 59 [2021-07-13 20:11:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:35,635 INFO L482 AbstractCegarLoop]: Abstraction has 11535 states and 28347 transitions. [2021-07-13 20:11:35,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 11535 states and 28347 transitions. [2021-07-13 20:11:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:35,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:35,646 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:35,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:35,847 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:35,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:35,847 INFO L82 PathProgramCache]: Analyzing trace with hash 130878807, now seen corresponding path program 80 times [2021-07-13 20:11:35,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:35,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410036257] [2021-07-13 20:11:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:36,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:36,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410036257] [2021-07-13 20:11:36,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410036257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:36,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038707398] [2021-07-13 20:11:36,243 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 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 [2021-07-13 20:11:36,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:36,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:36,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:36,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:36,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:36,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:36,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:36,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038707398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:36,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:36,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-07-13 20:11:36,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417605148] [2021-07-13 20:11:36,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:11:36,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:11:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:11:36,875 INFO L87 Difference]: Start difference. First operand 11535 states and 28347 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:37,934 INFO L93 Difference]: Finished difference Result 17463 states and 43379 transitions. [2021-07-13 20:11:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:11:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:37,961 INFO L225 Difference]: With dead ends: 17463 [2021-07-13 20:11:37,961 INFO L226 Difference]: Without dead ends: 17279 [2021-07-13 20:11:37,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1217.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:11:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17279 states. [2021-07-13 20:11:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17279 to 11599. [2021-07-13 20:11:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11599 states, 11598 states have (on average 2.4579237799620626) internal successors, (28507), 11598 states have internal predecessors, (28507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11599 states to 11599 states and 28507 transitions. [2021-07-13 20:11:38,164 INFO L78 Accepts]: Start accepts. Automaton has 11599 states and 28507 transitions. Word has length 59 [2021-07-13 20:11:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:38,164 INFO L482 AbstractCegarLoop]: Abstraction has 11599 states and 28507 transitions. [2021-07-13 20:11:38,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11599 states and 28507 transitions. [2021-07-13 20:11:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:38,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:38,174 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:38,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:38,374 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:38,375 INFO L82 PathProgramCache]: Analyzing trace with hash 741891415, now seen corresponding path program 81 times [2021-07-13 20:11:38,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:38,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231771631] [2021-07-13 20:11:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:38,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231771631] [2021-07-13 20:11:38,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231771631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801464170] [2021-07-13 20:11:38,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:11:38,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:11:38,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:38,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:39,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:39,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:39,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-07-13 20:11:39,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:39,460 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:11:39,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:39,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-07-13 20:11:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 13 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:39,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801464170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:39,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:39,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 20:11:39,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227082967] [2021-07-13 20:11:39,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:11:39,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:11:39,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:11:39,472 INFO L87 Difference]: Start difference. First operand 11599 states and 28507 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:42,487 INFO L93 Difference]: Finished difference Result 14723 states and 36187 transitions. [2021-07-13 20:11:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:11:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:42,511 INFO L225 Difference]: With dead ends: 14723 [2021-07-13 20:11:42,511 INFO L226 Difference]: Without dead ends: 14255 [2021-07-13 20:11:42,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2262.0ms TimeCoverageRelationStatistics Valid=358, Invalid=2834, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:11:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2021-07-13 20:11:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 12031. [2021-07-13 20:11:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12031 states, 12030 states have (on average 2.4587697423108894) internal successors, (29579), 12030 states have internal predecessors, (29579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 29579 transitions. [2021-07-13 20:11:42,742 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 29579 transitions. Word has length 59 [2021-07-13 20:11:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:42,742 INFO L482 AbstractCegarLoop]: Abstraction has 12031 states and 29579 transitions. [2021-07-13 20:11:42,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 29579 transitions. [2021-07-13 20:11:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:42,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:42,753 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:42,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:11:42,954 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1734215511, now seen corresponding path program 82 times [2021-07-13 20:11:42,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:42,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827211584] [2021-07-13 20:11:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:43,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827211584] [2021-07-13 20:11:43,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827211584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49725280] [2021-07-13 20:11:43,218 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 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 [2021-07-13 20:11:43,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:43,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:43,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:43,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:43,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:43,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:43,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:43,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:43,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:43,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49725280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:43,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:43,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 23 [2021-07-13 20:11:43,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965883937] [2021-07-13 20:11:43,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:11:43,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:11:43,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:11:43,729 INFO L87 Difference]: Start difference. First operand 12031 states and 29579 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:44,773 INFO L93 Difference]: Finished difference Result 18231 states and 45163 transitions. [2021-07-13 20:11:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:11:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:44,801 INFO L225 Difference]: With dead ends: 18231 [2021-07-13 20:11:44,802 INFO L226 Difference]: Without dead ends: 18143 [2021-07-13 20:11:44,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 971.1ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:11:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-07-13 20:11:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 11951. [2021-07-13 20:11:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11951 states, 11950 states have (on average 2.4584937238493723) internal successors, (29379), 11950 states have internal predecessors, (29379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11951 states to 11951 states and 29379 transitions. [2021-07-13 20:11:45,034 INFO L78 Accepts]: Start accepts. Automaton has 11951 states and 29379 transitions. Word has length 59 [2021-07-13 20:11:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:45,035 INFO L482 AbstractCegarLoop]: Abstraction has 11951 states and 29379 transitions. [2021-07-13 20:11:45,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 11951 states and 29379 transitions. [2021-07-13 20:11:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:45,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:45,046 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:45,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:45,246 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash -335422633, now seen corresponding path program 83 times [2021-07-13 20:11:45,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:45,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997261473] [2021-07-13 20:11:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:45,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:45,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997261473] [2021-07-13 20:11:45,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997261473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:45,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309621378] [2021-07-13 20:11:45,588 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 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 [2021-07-13 20:11:45,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:11:45,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:45,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:11:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:46,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:46,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-07-13 20:11:46,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:46,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:46,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:46,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-07-13 20:11:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:46,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309621378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:46,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:46,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-07-13 20:11:46,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884999105] [2021-07-13 20:11:46,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:11:46,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:11:46,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:11:46,339 INFO L87 Difference]: Start difference. First operand 11951 states and 29379 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:50,047 INFO L93 Difference]: Finished difference Result 20051 states and 49314 transitions. [2021-07-13 20:11:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:11:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:50,080 INFO L225 Difference]: With dead ends: 20051 [2021-07-13 20:11:50,080 INFO L226 Difference]: Without dead ends: 19783 [2021-07-13 20:11:50,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2951.3ms TimeCoverageRelationStatistics Valid=460, Invalid=5392, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:11:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19783 states. [2021-07-13 20:11:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19783 to 12207. [2021-07-13 20:11:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12207 states, 12206 states have (on average 2.459364247091594) internal successors, (30019), 12206 states have internal predecessors, (30019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12207 states to 12207 states and 30019 transitions. [2021-07-13 20:11:50,327 INFO L78 Accepts]: Start accepts. Automaton has 12207 states and 30019 transitions. Word has length 59 [2021-07-13 20:11:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:50,327 INFO L482 AbstractCegarLoop]: Abstraction has 12207 states and 30019 transitions. [2021-07-13 20:11:50,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12207 states and 30019 transitions. [2021-07-13 20:11:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:50,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:50,339 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:50,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:11:50,539 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash 312192855, now seen corresponding path program 84 times [2021-07-13 20:11:50,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:50,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240305811] [2021-07-13 20:11:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:50,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:50,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240305811] [2021-07-13 20:11:50,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240305811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:50,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109432140] [2021-07-13 20:11:50,851 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 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 [2021-07-13 20:11:50,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:11:50,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:50,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:51,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:51,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:51,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:51,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:51,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:51,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:51,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109432140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:51,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:51,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2021-07-13 20:11:51,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979280250] [2021-07-13 20:11:51,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:11:51,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:51,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:11:51,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:11:51,391 INFO L87 Difference]: Start difference. First operand 12207 states and 30019 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:52,558 INFO L93 Difference]: Finished difference Result 18119 states and 44843 transitions. [2021-07-13 20:11:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:11:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:11:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:52,586 INFO L225 Difference]: With dead ends: 18119 [2021-07-13 20:11:52,587 INFO L226 Difference]: Without dead ends: 18031 [2021-07-13 20:11:52,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1075.0ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:11:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-07-13 20:11:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 12207. [2021-07-13 20:11:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12207 states, 12206 states have (on average 2.459364247091594) internal successors, (30019), 12206 states have internal predecessors, (30019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12207 states to 12207 states and 30019 transitions. [2021-07-13 20:11:52,780 INFO L78 Accepts]: Start accepts. Automaton has 12207 states and 30019 transitions. Word has length 59 [2021-07-13 20:11:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:52,780 INFO L482 AbstractCegarLoop]: Abstraction has 12207 states and 30019 transitions. [2021-07-13 20:11:52,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 12207 states and 30019 transitions. [2021-07-13 20:11:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:52,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:52,792 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:52,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:52,992 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1110759767, now seen corresponding path program 85 times [2021-07-13 20:11:52,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:52,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070611590] [2021-07-13 20:11:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070611590] [2021-07-13 20:11:53,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070611590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422043317] [2021-07-13 20:11:53,329 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 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 [2021-07-13 20:11:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:53,781 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-07-13 20:11:53,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:53,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:53,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:53,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:53,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:126, output treesize:7 [2021-07-13 20:11:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:53,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422043317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:53,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:53,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2021-07-13 20:11:53,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050745338] [2021-07-13 20:11:53,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:11:53,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:53,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:11:53,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:11:53,797 INFO L87 Difference]: Start difference. First operand 12207 states and 30019 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 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) [2021-07-13 20:11:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:54,768 INFO L93 Difference]: Finished difference Result 16227 states and 40031 transitions. [2021-07-13 20:11:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:11:54,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 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 59 [2021-07-13 20:11:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:54,797 INFO L225 Difference]: With dead ends: 16227 [2021-07-13 20:11:54,797 INFO L226 Difference]: Without dead ends: 16191 [2021-07-13 20:11:54,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1026.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:11:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16191 states. [2021-07-13 20:11:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16191 to 12239. [2021-07-13 20:11:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12239 states, 12238 states have (on average 2.4594705017159666) internal successors, (30099), 12238 states have internal predecessors, (30099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12239 states to 12239 states and 30099 transitions. [2021-07-13 20:11:54,998 INFO L78 Accepts]: Start accepts. Automaton has 12239 states and 30099 transitions. Word has length 59 [2021-07-13 20:11:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:54,999 INFO L482 AbstractCegarLoop]: Abstraction has 12239 states and 30099 transitions. [2021-07-13 20:11:54,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 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) [2021-07-13 20:11:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 12239 states and 30099 transitions. [2021-07-13 20:11:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 20:11:55,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:55,012 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:55,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:55,213 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash 69241945, now seen corresponding path program 86 times [2021-07-13 20:11:55,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:55,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137465727] [2021-07-13 20:11:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:55,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137465727] [2021-07-13 20:11:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137465727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123143730] [2021-07-13 20:11:55,267 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 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 [2021-07-13 20:11:55,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:11:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:11:55,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123143730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:55,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:55,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 20:11:55,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696437517] [2021-07-13 20:11:55,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:11:55,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:55,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:11:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:11:55,377 INFO L87 Difference]: Start difference. First operand 12239 states and 30099 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:55,453 INFO L93 Difference]: Finished difference Result 14079 states and 34539 transitions. [2021-07-13 20:11:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:11:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-07-13 20:11:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:55,474 INFO L225 Difference]: With dead ends: 14079 [2021-07-13 20:11:55,474 INFO L226 Difference]: Without dead ends: 14071 [2021-07-13 20:11:55,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:11:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14071 states. [2021-07-13 20:11:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14071 to 12495. [2021-07-13 20:11:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12495 states, 12494 states have (on average 2.4615815591483914) internal successors, (30755), 12494 states have internal predecessors, (30755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12495 states to 12495 states and 30755 transitions. [2021-07-13 20:11:55,647 INFO L78 Accepts]: Start accepts. Automaton has 12495 states and 30755 transitions. Word has length 61 [2021-07-13 20:11:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:55,647 INFO L482 AbstractCegarLoop]: Abstraction has 12495 states and 30755 transitions. [2021-07-13 20:11:55,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12495 states and 30755 transitions. [2021-07-13 20:11:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:11:55,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:55,659 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:55,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:55,860 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -462180397, now seen corresponding path program 87 times [2021-07-13 20:11:55,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:55,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890061357] [2021-07-13 20:11:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:11:56,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890061357] [2021-07-13 20:11:56,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890061357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321074244] [2021-07-13 20:11:56,139 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 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 [2021-07-13 20:11:56,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:11:56,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:56,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:11:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:56,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:56,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:11:56,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:11:56,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-13 20:11:56,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:56,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-13 20:11:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:11:56,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321074244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:56,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:56,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 25 [2021-07-13 20:11:56,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207855201] [2021-07-13 20:11:56,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:11:56,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:56,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:11:56,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:11:56,743 INFO L87 Difference]: Start difference. First operand 12495 states and 30755 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:58,966 INFO L93 Difference]: Finished difference Result 20747 states and 51611 transitions. [2021-07-13 20:11:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:11:58,967 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-13 20:11:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:58,999 INFO L225 Difference]: With dead ends: 20747 [2021-07-13 20:11:58,999 INFO L226 Difference]: Without dead ends: 20543 [2021-07-13 20:11:58,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2058.6ms TimeCoverageRelationStatistics Valid=449, Invalid=3457, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:11:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20543 states. [2021-07-13 20:11:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20543 to 12831. [2021-07-13 20:11:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12831 states, 12830 states have (on average 2.462587685113016) internal successors, (31595), 12830 states have internal predecessors, (31595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12831 states to 12831 states and 31595 transitions. [2021-07-13 20:11:59,251 INFO L78 Accepts]: Start accepts. Automaton has 12831 states and 31595 transitions. Word has length 63 [2021-07-13 20:11:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:59,251 INFO L482 AbstractCegarLoop]: Abstraction has 12831 states and 31595 transitions. [2021-07-13 20:11:59,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12831 states and 31595 transitions. [2021-07-13 20:11:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:11:59,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:59,264 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:59,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:59,464 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash -730260523, now seen corresponding path program 88 times [2021-07-13 20:11:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:59,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606800216] [2021-07-13 20:11:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:59,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:59,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606800216] [2021-07-13 20:11:59,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606800216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:59,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347062882] [2021-07-13 20:11:59,781 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 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 [2021-07-13 20:11:59,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:59,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:11:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:00,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:00,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:00,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347062882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:00,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:00,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-07-13 20:12:00,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45034486] [2021-07-13 20:12:00,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:12:00,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:00,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:12:00,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:12:00,620 INFO L87 Difference]: Start difference. First operand 12831 states and 31595 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:02,845 INFO L93 Difference]: Finished difference Result 26167 states and 65219 transitions. [2021-07-13 20:12:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:12:02,849 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:02,900 INFO L225 Difference]: With dead ends: 26167 [2021-07-13 20:12:02,900 INFO L226 Difference]: Without dead ends: 25935 [2021-07-13 20:12:02,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1490.1ms TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:12:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25935 states. [2021-07-13 20:12:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25935 to 12767. [2021-07-13 20:12:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12767 states, 12766 states have (on average 2.4630267899107) internal successors, (31443), 12766 states have internal predecessors, (31443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12767 states to 12767 states and 31443 transitions. [2021-07-13 20:12:03,190 INFO L78 Accepts]: Start accepts. Automaton has 12767 states and 31443 transitions. Word has length 65 [2021-07-13 20:12:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:03,190 INFO L482 AbstractCegarLoop]: Abstraction has 12767 states and 31443 transitions. [2021-07-13 20:12:03,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 12767 states and 31443 transitions. [2021-07-13 20:12:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:03,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:03,204 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:03,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 20:12:03,404 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1063861717, now seen corresponding path program 89 times [2021-07-13 20:12:03,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:03,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588163361] [2021-07-13 20:12:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:03,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:03,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588163361] [2021-07-13 20:12:03,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588163361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:03,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462008991] [2021-07-13 20:12:03,782 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 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 [2021-07-13 20:12:03,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:12:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:12:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:04,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:04,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-07-13 20:12:04,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:04,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-07-13 20:12:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:04,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462008991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:04,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:04,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-07-13 20:12:04,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083779942] [2021-07-13 20:12:04,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:04,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:04,825 INFO L87 Difference]: Start difference. First operand 12767 states and 31443 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:09,710 INFO L93 Difference]: Finished difference Result 24055 states and 59703 transitions. [2021-07-13 20:12:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:12:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:09,757 INFO L225 Difference]: With dead ends: 24055 [2021-07-13 20:12:09,758 INFO L226 Difference]: Without dead ends: 23455 [2021-07-13 20:12:09,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 3023.0ms TimeCoverageRelationStatistics Valid=429, Invalid=4541, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:12:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23455 states. [2021-07-13 20:12:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23455 to 13455. [2021-07-13 20:12:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13455 states, 13454 states have (on average 2.4631336405529956) internal successors, (33139), 13454 states have internal predecessors, (33139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13455 states to 13455 states and 33139 transitions. [2021-07-13 20:12:10,028 INFO L78 Accepts]: Start accepts. Automaton has 13455 states and 33139 transitions. Word has length 65 [2021-07-13 20:12:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:10,028 INFO L482 AbstractCegarLoop]: Abstraction has 13455 states and 33139 transitions. [2021-07-13 20:12:10,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13455 states and 33139 transitions. [2021-07-13 20:12:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:10,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:10,043 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:10,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:10,244 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash 73711061, now seen corresponding path program 90 times [2021-07-13 20:12:10,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:10,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972845129] [2021-07-13 20:12:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:10,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:10,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972845129] [2021-07-13 20:12:10,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972845129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:10,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312827824] [2021-07-13 20:12:10,802 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 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 [2021-07-13 20:12:10,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:12:10,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:11,176 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:12:11,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:11,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:11,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:11,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:11,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:11,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:11,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312827824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:11,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:11,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-07-13 20:12:11,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784270277] [2021-07-13 20:12:11,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:12:11,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:12:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:12:11,999 INFO L87 Difference]: Start difference. First operand 13455 states and 33139 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:13,759 INFO L93 Difference]: Finished difference Result 24487 states and 61059 transitions. [2021-07-13 20:12:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:12:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:13,804 INFO L225 Difference]: With dead ends: 24487 [2021-07-13 20:12:13,804 INFO L226 Difference]: Without dead ends: 24255 [2021-07-13 20:12:13,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1995.1ms TimeCoverageRelationStatistics Valid=348, Invalid=3434, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:12:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24255 states. [2021-07-13 20:12:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24255 to 11647. [2021-07-13 20:12:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11647 states, 11646 states have (on average 2.460844925296239) internal successors, (28659), 11646 states have internal predecessors, (28659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11647 states to 11647 states and 28659 transitions. [2021-07-13 20:12:14,099 INFO L78 Accepts]: Start accepts. Automaton has 11647 states and 28659 transitions. Word has length 65 [2021-07-13 20:12:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:14,099 INFO L482 AbstractCegarLoop]: Abstraction has 11647 states and 28659 transitions. [2021-07-13 20:12:14,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 11647 states and 28659 transitions. [2021-07-13 20:12:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:14,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:14,112 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:14,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 20:12:14,313 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1867833301, now seen corresponding path program 91 times [2021-07-13 20:12:14,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:14,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658140085] [2021-07-13 20:12:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:14,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:14,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658140085] [2021-07-13 20:12:14,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658140085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:14,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827946595] [2021-07-13 20:12:14,763 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 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 [2021-07-13 20:12:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:15,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:15,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:15,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:15,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:15,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:15,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:15,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:15,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:15,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:15,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:15,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827946595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:15,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:15,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-07-13 20:12:15,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795506737] [2021-07-13 20:12:15,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:12:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:12:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:12:15,742 INFO L87 Difference]: Start difference. First operand 11647 states and 28659 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:17,439 INFO L93 Difference]: Finished difference Result 20823 states and 51611 transitions. [2021-07-13 20:12:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:12:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:17,471 INFO L225 Difference]: With dead ends: 20823 [2021-07-13 20:12:17,471 INFO L226 Difference]: Without dead ends: 20783 [2021-07-13 20:12:17,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1695.2ms TimeCoverageRelationStatistics Valid=354, Invalid=3428, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:12:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20783 states. [2021-07-13 20:12:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20783 to 11631. [2021-07-13 20:12:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11631 states, 11630 states have (on average 2.4607910576096304) internal successors, (28619), 11630 states have internal predecessors, (28619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11631 states to 11631 states and 28619 transitions. [2021-07-13 20:12:17,693 INFO L78 Accepts]: Start accepts. Automaton has 11631 states and 28619 transitions. Word has length 65 [2021-07-13 20:12:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:17,693 INFO L482 AbstractCegarLoop]: Abstraction has 11631 states and 28619 transitions. [2021-07-13 20:12:17,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 11631 states and 28619 transitions. [2021-07-13 20:12:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:17,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:17,705 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:17,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:17,906 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2139158059, now seen corresponding path program 92 times [2021-07-13 20:12:17,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:17,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809129432] [2021-07-13 20:12:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:18,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809129432] [2021-07-13 20:12:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809129432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067272271] [2021-07-13 20:12:18,261 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 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 [2021-07-13 20:12:18,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:18,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:19,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:19,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:19,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:19,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:19,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:19,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:19,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:19,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:19,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:19,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:19,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:19,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067272271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:19,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:19,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-07-13 20:12:19,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401225913] [2021-07-13 20:12:19,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:12:19,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:12:19,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:12:19,128 INFO L87 Difference]: Start difference. First operand 11631 states and 28619 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:20,692 INFO L93 Difference]: Finished difference Result 20559 states and 50855 transitions. [2021-07-13 20:12:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:12:20,693 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:20,724 INFO L225 Difference]: With dead ends: 20559 [2021-07-13 20:12:20,724 INFO L226 Difference]: Without dead ends: 20495 [2021-07-13 20:12:20,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1440.9ms TimeCoverageRelationStatistics Valid=303, Invalid=2889, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:12:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20495 states. [2021-07-13 20:12:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20495 to 12623. [2021-07-13 20:12:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12623 states, 12622 states have (on average 2.456266835683727) internal successors, (31003), 12622 states have internal predecessors, (31003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12623 states to 12623 states and 31003 transitions. [2021-07-13 20:12:20,967 INFO L78 Accepts]: Start accepts. Automaton has 12623 states and 31003 transitions. Word has length 65 [2021-07-13 20:12:20,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:20,967 INFO L482 AbstractCegarLoop]: Abstraction has 12623 states and 31003 transitions. [2021-07-13 20:12:20,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:20,967 INFO L276 IsEmpty]: Start isEmpty. Operand 12623 states and 31003 transitions. [2021-07-13 20:12:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:20,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:20,979 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:21,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:21,181 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash 49742293, now seen corresponding path program 93 times [2021-07-13 20:12:21,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:21,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341415849] [2021-07-13 20:12:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:12:21,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:21,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341415849] [2021-07-13 20:12:21,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341415849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:21,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361672701] [2021-07-13 20:12:21,491 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 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 [2021-07-13 20:12:21,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:12:21,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:21,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:12:21,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:22,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:22,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:22,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:22,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:22,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:22,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:22,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:22,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:22,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:22,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 13 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:22,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361672701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:22,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:22,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 30 [2021-07-13 20:12:22,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553759595] [2021-07-13 20:12:22,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:12:22,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:12:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:12:22,386 INFO L87 Difference]: Start difference. First operand 12623 states and 31003 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:24,026 INFO L93 Difference]: Finished difference Result 16735 states and 41197 transitions. [2021-07-13 20:12:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:12:24,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:24,053 INFO L225 Difference]: With dead ends: 16735 [2021-07-13 20:12:24,053 INFO L226 Difference]: Without dead ends: 16383 [2021-07-13 20:12:24,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1438.2ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:12:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16383 states. [2021-07-13 20:12:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16383 to 13615. [2021-07-13 20:12:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13615 states, 13614 states have (on average 2.457102982224181) internal successors, (33451), 13614 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13615 states to 13615 states and 33451 transitions. [2021-07-13 20:12:24,285 INFO L78 Accepts]: Start accepts. Automaton has 13615 states and 33451 transitions. Word has length 65 [2021-07-13 20:12:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:24,285 INFO L482 AbstractCegarLoop]: Abstraction has 13615 states and 33451 transitions. [2021-07-13 20:12:24,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 13615 states and 33451 transitions. [2021-07-13 20:12:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:24,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:24,301 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:24,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 20:12:24,502 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1456921643, now seen corresponding path program 94 times [2021-07-13 20:12:24,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:24,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450727403] [2021-07-13 20:12:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:24,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450727403] [2021-07-13 20:12:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450727403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113538608] [2021-07-13 20:12:24,789 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 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 [2021-07-13 20:12:24,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:25,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:25,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:25,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:25,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113538608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:25,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:25,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2021-07-13 20:12:25,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649564897] [2021-07-13 20:12:25,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:25,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:25,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:25,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:25,703 INFO L87 Difference]: Start difference. First operand 13615 states and 33451 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:27,054 INFO L93 Difference]: Finished difference Result 20887 states and 51699 transitions. [2021-07-13 20:12:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:12:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:27,089 INFO L225 Difference]: With dead ends: 20887 [2021-07-13 20:12:27,089 INFO L226 Difference]: Without dead ends: 20799 [2021-07-13 20:12:27,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1370.4ms TimeCoverageRelationStatistics Valid=271, Invalid=2591, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:12:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20799 states. [2021-07-13 20:12:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20799 to 13471. [2021-07-13 20:12:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13471 states, 13470 states have (on average 2.4566443949517445) internal successors, (33091), 13470 states have internal predecessors, (33091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13471 states to 13471 states and 33091 transitions. [2021-07-13 20:12:27,419 INFO L78 Accepts]: Start accepts. Automaton has 13471 states and 33091 transitions. Word has length 65 [2021-07-13 20:12:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:27,419 INFO L482 AbstractCegarLoop]: Abstraction has 13471 states and 33091 transitions. [2021-07-13 20:12:27,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 13471 states and 33091 transitions. [2021-07-13 20:12:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:27,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:27,434 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:27,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:12:27,636 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1596763093, now seen corresponding path program 95 times [2021-07-13 20:12:27,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:27,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102396214] [2021-07-13 20:12:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:28,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102396214] [2021-07-13 20:12:28,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102396214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790698410] [2021-07-13 20:12:28,027 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 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 [2021-07-13 20:12:28,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:12:28,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:28,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:28,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:28,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:28,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:28,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:28,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:28,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:28,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:28,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:28,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:28,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790698410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:28,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:28,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-07-13 20:12:28,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808608480] [2021-07-13 20:12:28,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:12:28,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:12:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:12:28,876 INFO L87 Difference]: Start difference. First operand 13471 states and 33091 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:30,541 INFO L93 Difference]: Finished difference Result 22039 states and 54763 transitions. [2021-07-13 20:12:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:12:30,541 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:30,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:30,579 INFO L225 Difference]: With dead ends: 22039 [2021-07-13 20:12:30,580 INFO L226 Difference]: Without dead ends: 21855 [2021-07-13 20:12:30,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1511.6ms TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:12:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21855 states. [2021-07-13 20:12:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21855 to 13535. [2021-07-13 20:12:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13535 states, 13534 states have (on average 2.456849416284912) internal successors, (33251), 13534 states have internal predecessors, (33251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13535 states to 13535 states and 33251 transitions. [2021-07-13 20:12:30,892 INFO L78 Accepts]: Start accepts. Automaton has 13535 states and 33251 transitions. Word has length 65 [2021-07-13 20:12:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:30,892 INFO L482 AbstractCegarLoop]: Abstraction has 13535 states and 33251 transitions. [2021-07-13 20:12:30,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13535 states and 33251 transitions. [2021-07-13 20:12:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:30,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:30,907 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:31,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:31,108 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash 233515989, now seen corresponding path program 96 times [2021-07-13 20:12:31,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:31,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687906143] [2021-07-13 20:12:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:12:31,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687906143] [2021-07-13 20:12:31,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687906143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507496522] [2021-07-13 20:12:31,442 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 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 [2021-07-13 20:12:31,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:12:31,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:12:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:32,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:32,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:32,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:32,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:32,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:32,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:32,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:32,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 13 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:32,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507496522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:32,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:32,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 30 [2021-07-13 20:12:32,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932312444] [2021-07-13 20:12:32,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:12:32,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:12:32,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:12:32,260 INFO L87 Difference]: Start difference. First operand 13535 states and 33251 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:33,819 INFO L93 Difference]: Finished difference Result 16767 states and 41237 transitions. [2021-07-13 20:12:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:12:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:33,843 INFO L225 Difference]: With dead ends: 16767 [2021-07-13 20:12:33,843 INFO L226 Difference]: Without dead ends: 16447 [2021-07-13 20:12:33,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1377.0ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:12:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16447 states. [2021-07-13 20:12:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16447 to 14319. [2021-07-13 20:12:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14319 states, 14318 states have (on average 2.456418494203101) internal successors, (35171), 14318 states have internal predecessors, (35171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14319 states to 14319 states and 35171 transitions. [2021-07-13 20:12:34,052 INFO L78 Accepts]: Start accepts. Automaton has 14319 states and 35171 transitions. Word has length 65 [2021-07-13 20:12:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:34,052 INFO L482 AbstractCegarLoop]: Abstraction has 14319 states and 35171 transitions. [2021-07-13 20:12:34,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14319 states and 35171 transitions. [2021-07-13 20:12:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:34,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:34,069 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:34,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:12:34,269 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1273147947, now seen corresponding path program 97 times [2021-07-13 20:12:34,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:34,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027573687] [2021-07-13 20:12:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:34,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:34,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027573687] [2021-07-13 20:12:34,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027573687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:34,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502582383] [2021-07-13 20:12:34,547 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 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 [2021-07-13 20:12:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:34,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:34,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:35,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:35,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:35,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:35,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:35,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:35,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:35,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:35,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:35,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:35,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:35,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:35,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502582383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:35,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:35,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2021-07-13 20:12:35,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265434738] [2021-07-13 20:12:35,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:35,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:35,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:35,377 INFO L87 Difference]: Start difference. First operand 14319 states and 35171 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:36,551 INFO L93 Difference]: Finished difference Result 21095 states and 52219 transitions. [2021-07-13 20:12:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:12:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:36,586 INFO L225 Difference]: With dead ends: 21095 [2021-07-13 20:12:36,587 INFO L226 Difference]: Without dead ends: 21007 [2021-07-13 20:12:36,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1349.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:12:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21007 states. [2021-07-13 20:12:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21007 to 14239. [2021-07-13 20:12:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14239 states, 14238 states have (on average 2.4561736198904343) internal successors, (34971), 14238 states have internal predecessors, (34971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14239 states to 14239 states and 34971 transitions. [2021-07-13 20:12:36,890 INFO L78 Accepts]: Start accepts. Automaton has 14239 states and 34971 transitions. Word has length 65 [2021-07-13 20:12:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:36,890 INFO L482 AbstractCegarLoop]: Abstraction has 14239 states and 34971 transitions. [2021-07-13 20:12:36,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 14239 states and 34971 transitions. [2021-07-13 20:12:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:36,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:36,904 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:37,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:12:37,105 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1298132523, now seen corresponding path program 98 times [2021-07-13 20:12:37,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:37,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521456455] [2021-07-13 20:12:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:37,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:37,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521456455] [2021-07-13 20:12:37,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521456455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:37,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206837020] [2021-07-13 20:12:37,453 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 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 [2021-07-13 20:12:37,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:37,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:37,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:37,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:38,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:38,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:38,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:38,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:38,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:38,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:38,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:38,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:38,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206837020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:38,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:38,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-07-13 20:12:38,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894127918] [2021-07-13 20:12:38,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:12:38,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:12:38,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:12:38,312 INFO L87 Difference]: Start difference. First operand 14239 states and 34971 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:39,972 INFO L93 Difference]: Finished difference Result 24103 states and 59715 transitions. [2021-07-13 20:12:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:12:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:40,012 INFO L225 Difference]: With dead ends: 24103 [2021-07-13 20:12:40,012 INFO L226 Difference]: Without dead ends: 24015 [2021-07-13 20:12:40,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1445.8ms TimeCoverageRelationStatistics Valid=294, Invalid=2786, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:12:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24015 states. [2021-07-13 20:12:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24015 to 14063. [2021-07-13 20:12:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14063 states, 14062 states have (on average 2.4556250888920497) internal successors, (34531), 14062 states have internal predecessors, (34531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14063 states to 14063 states and 34531 transitions. [2021-07-13 20:12:40,291 INFO L78 Accepts]: Start accepts. Automaton has 14063 states and 34531 transitions. Word has length 65 [2021-07-13 20:12:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:40,291 INFO L482 AbstractCegarLoop]: Abstraction has 14063 states and 34531 transitions. [2021-07-13 20:12:40,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 14063 states and 34531 transitions. [2021-07-13 20:12:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:40,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:40,307 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:40,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 20:12:40,509 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1780536789, now seen corresponding path program 99 times [2021-07-13 20:12:40,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:40,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220275051] [2021-07-13 20:12:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:40,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:40,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220275051] [2021-07-13 20:12:40,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220275051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:40,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341823438] [2021-07-13 20:12:40,877 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 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 [2021-07-13 20:12:40,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:12:40,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:41,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:41,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:41,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:41,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:41,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:41,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:41,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:41,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:41,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341823438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:41,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:41,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-07-13 20:12:41,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626931981] [2021-07-13 20:12:41,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:12:41,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:41,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:12:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:12:41,782 INFO L87 Difference]: Start difference. First operand 14063 states and 34531 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:43,460 INFO L93 Difference]: Finished difference Result 22903 states and 56715 transitions. [2021-07-13 20:12:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:12:43,460 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:43,498 INFO L225 Difference]: With dead ends: 22903 [2021-07-13 20:12:43,498 INFO L226 Difference]: Without dead ends: 22815 [2021-07-13 20:12:43,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1520.5ms TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:12:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22815 states. [2021-07-13 20:12:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22815 to 14063. [2021-07-13 20:12:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14063 states, 14062 states have (on average 2.4556250888920497) internal successors, (34531), 14062 states have internal predecessors, (34531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14063 states to 14063 states and 34531 transitions. [2021-07-13 20:12:43,769 INFO L78 Accepts]: Start accepts. Automaton has 14063 states and 34531 transitions. Word has length 65 [2021-07-13 20:12:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:43,769 INFO L482 AbstractCegarLoop]: Abstraction has 14063 states and 34531 transitions. [2021-07-13 20:12:43,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 14063 states and 34531 transitions. [2021-07-13 20:12:43,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:43,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:43,785 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:43,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:43,986 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:43,986 INFO L82 PathProgramCache]: Analyzing trace with hash -644843563, now seen corresponding path program 100 times [2021-07-13 20:12:43,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:43,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566320767] [2021-07-13 20:12:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:44,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:44,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566320767] [2021-07-13 20:12:44,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566320767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:44,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739024628] [2021-07-13 20:12:44,429 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 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 [2021-07-13 20:12:44,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:44,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:44,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:45,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:45,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:45,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:45,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:45,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:45,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:45,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:45,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:45,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:45,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:45,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:45,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739024628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:45,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:45,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-07-13 20:12:45,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011193322] [2021-07-13 20:12:45,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:12:45,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:12:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:12:45,291 INFO L87 Difference]: Start difference. First operand 14063 states and 34531 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:46,806 INFO L93 Difference]: Finished difference Result 20679 states and 51067 transitions. [2021-07-13 20:12:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:12:46,807 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:46,844 INFO L225 Difference]: With dead ends: 20679 [2021-07-13 20:12:46,844 INFO L226 Difference]: Without dead ends: 20639 [2021-07-13 20:12:46,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1534.6ms TimeCoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:12:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20639 states. [2021-07-13 20:12:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20639 to 14079. [2021-07-13 20:12:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14079 states, 14078 states have (on average 2.455675522091206) internal successors, (34571), 14078 states have internal predecessors, (34571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14079 states to 14079 states and 34571 transitions. [2021-07-13 20:12:47,106 INFO L78 Accepts]: Start accepts. Automaton has 14079 states and 34571 transitions. Word has length 65 [2021-07-13 20:12:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:47,106 INFO L482 AbstractCegarLoop]: Abstraction has 14079 states and 34571 transitions. [2021-07-13 20:12:47,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 14079 states and 34571 transitions. [2021-07-13 20:12:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:47,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:47,122 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:47,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 20:12:47,323 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1077400619, now seen corresponding path program 101 times [2021-07-13 20:12:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:47,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774119909] [2021-07-13 20:12:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:47,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:47,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774119909] [2021-07-13 20:12:47,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774119909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:47,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101704448] [2021-07-13 20:12:47,700 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 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 [2021-07-13 20:12:47,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:12:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:12:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:48,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:48,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:48,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:48,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:48,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:48,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:48,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:48,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:48,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101704448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:48,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:48,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-07-13 20:12:48,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835766342] [2021-07-13 20:12:48,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:12:48,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:48,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:12:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:12:48,569 INFO L87 Difference]: Start difference. First operand 14079 states and 34571 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:50,696 INFO L93 Difference]: Finished difference Result 24675 states and 60920 transitions. [2021-07-13 20:12:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:12:50,697 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:50,739 INFO L225 Difference]: With dead ends: 24675 [2021-07-13 20:12:50,740 INFO L226 Difference]: Without dead ends: 24183 [2021-07-13 20:12:50,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1617.7ms TimeCoverageRelationStatistics Valid=349, Invalid=3311, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:12:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24183 states. [2021-07-13 20:12:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24183 to 16303. [2021-07-13 20:12:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 2.457796589375537) internal successors, (40067), 16302 states have internal predecessors, (40067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 40067 transitions. [2021-07-13 20:12:51,062 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 40067 transitions. Word has length 65 [2021-07-13 20:12:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:51,062 INFO L482 AbstractCegarLoop]: Abstraction has 16303 states and 40067 transitions. [2021-07-13 20:12:51,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 40067 transitions. [2021-07-13 20:12:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:51,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:51,084 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:51,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 20:12:51,284 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1111499733, now seen corresponding path program 102 times [2021-07-13 20:12:51,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:51,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840369005] [2021-07-13 20:12:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:51,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:51,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840369005] [2021-07-13 20:12:51,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840369005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:51,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312012853] [2021-07-13 20:12:51,631 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 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 [2021-07-13 20:12:51,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:12:51,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:51,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:12:51,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:52,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:52,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:52,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 55 [2021-07-13 20:12:52,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:52,583 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:12:52,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:52,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:161, output treesize:7 [2021-07-13 20:12:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:52,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312012853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:52,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:52,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 30 [2021-07-13 20:12:52,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720591225] [2021-07-13 20:12:52,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:12:52,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:12:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:12:52,596 INFO L87 Difference]: Start difference. First operand 16303 states and 40067 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:56,282 INFO L93 Difference]: Finished difference Result 21779 states and 53546 transitions. [2021-07-13 20:12:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:12:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:56,321 INFO L225 Difference]: With dead ends: 21779 [2021-07-13 20:12:56,321 INFO L226 Difference]: Without dead ends: 21335 [2021-07-13 20:12:56,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1948.3ms TimeCoverageRelationStatistics Valid=284, Invalid=3022, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:12:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21335 states. [2021-07-13 20:12:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21335 to 18591. [2021-07-13 20:12:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18591 states, 18590 states have (on average 2.4615922538999464) internal successors, (45761), 18590 states have internal predecessors, (45761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18591 states to 18591 states and 45761 transitions. [2021-07-13 20:12:56,660 INFO L78 Accepts]: Start accepts. Automaton has 18591 states and 45761 transitions. Word has length 65 [2021-07-13 20:12:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:56,660 INFO L482 AbstractCegarLoop]: Abstraction has 18591 states and 45761 transitions. [2021-07-13 20:12:56,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 18591 states and 45761 transitions. [2021-07-13 20:12:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:12:56,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:56,684 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:56,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:56,885 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1636446763, now seen corresponding path program 103 times [2021-07-13 20:12:56,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:56,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052331474] [2021-07-13 20:12:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:57,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052331474] [2021-07-13 20:12:57,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052331474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846364512] [2021-07-13 20:12:57,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:12:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:58,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:58,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:12:58,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:58,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:58,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:58,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:12:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846364512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:58,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-07-13 20:12:58,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781310358] [2021-07-13 20:12:58,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:12:58,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:58,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:12:58,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:12:58,255 INFO L87 Difference]: Start difference. First operand 18591 states and 45761 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:59,674 INFO L93 Difference]: Finished difference Result 27583 states and 68478 transitions. [2021-07-13 20:12:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:12:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:12:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:59,727 INFO L225 Difference]: With dead ends: 27583 [2021-07-13 20:12:59,727 INFO L226 Difference]: Without dead ends: 27351 [2021-07-13 20:12:59,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1535.2ms TimeCoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:12:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27351 states. [2021-07-13 20:13:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27351 to 18767. [2021-07-13 20:13:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18767 states, 18766 states have (on average 2.4615261643397632) internal successors, (46193), 18766 states have internal predecessors, (46193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18767 states to 18767 states and 46193 transitions. [2021-07-13 20:13:00,223 INFO L78 Accepts]: Start accepts. Automaton has 18767 states and 46193 transitions. Word has length 65 [2021-07-13 20:13:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:00,223 INFO L482 AbstractCegarLoop]: Abstraction has 18767 states and 46193 transitions. [2021-07-13 20:13:00,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:00,223 INFO L276 IsEmpty]: Start isEmpty. Operand 18767 states and 46193 transitions. [2021-07-13 20:13:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:00,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:00,243 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:00,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:00,443 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash -211390507, now seen corresponding path program 104 times [2021-07-13 20:13:00,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:00,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873271914] [2021-07-13 20:13:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:00,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873271914] [2021-07-13 20:13:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873271914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898277147] [2021-07-13 20:13:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:00,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:00,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:00,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:01,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:01,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:01,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:01,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:01,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 11 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:01,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898277147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:01,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:01,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 30 [2021-07-13 20:13:01,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715647593] [2021-07-13 20:13:01,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:13:01,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:13:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:13:01,499 INFO L87 Difference]: Start difference. First operand 18767 states and 46193 transitions. Second operand has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 30 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:03,966 INFO L93 Difference]: Finished difference Result 26623 states and 65734 transitions. [2021-07-13 20:13:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:13:03,966 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 30 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:04,012 INFO L225 Difference]: With dead ends: 26623 [2021-07-13 20:13:04,012 INFO L226 Difference]: Without dead ends: 26103 [2021-07-13 20:13:04,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1958.7ms TimeCoverageRelationStatistics Valid=353, Invalid=3307, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:13:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26103 states. [2021-07-13 20:13:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26103 to 19727. [2021-07-13 20:13:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19727 states, 19726 states have (on average 2.462181891919294) internal successors, (48569), 19726 states have internal predecessors, (48569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19727 states to 19727 states and 48569 transitions. [2021-07-13 20:13:04,364 INFO L78 Accepts]: Start accepts. Automaton has 19727 states and 48569 transitions. Word has length 65 [2021-07-13 20:13:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:04,364 INFO L482 AbstractCegarLoop]: Abstraction has 19727 states and 48569 transitions. [2021-07-13 20:13:04,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 30 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 19727 states and 48569 transitions. [2021-07-13 20:13:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:04,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:04,388 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:04,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:04,589 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash -236375083, now seen corresponding path program 105 times [2021-07-13 20:13:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:04,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156158369] [2021-07-13 20:13:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:04,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:04,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156158369] [2021-07-13 20:13:04,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156158369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:04,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2223023] [2021-07-13 20:13:04,929 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 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 [2021-07-13 20:13:04,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:13:04,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:13:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:05,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:05,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:05,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:05,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:05,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:05,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:05,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2223023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:05,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:05,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 32 [2021-07-13 20:13:05,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905332016] [2021-07-13 20:13:05,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:05,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:05,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:05,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:05,815 INFO L87 Difference]: Start difference. First operand 19727 states and 48569 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:07,557 INFO L93 Difference]: Finished difference Result 32131 states and 79518 transitions. [2021-07-13 20:13:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:13:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:07,612 INFO L225 Difference]: With dead ends: 32131 [2021-07-13 20:13:07,613 INFO L226 Difference]: Without dead ends: 31719 [2021-07-13 20:13:07,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1430.1ms TimeCoverageRelationStatistics Valid=298, Invalid=2782, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:13:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31719 states. [2021-07-13 20:13:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31719 to 19679. [2021-07-13 20:13:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19679 states, 19678 states have (on average 2.4620896432564283) internal successors, (48449), 19678 states have internal predecessors, (48449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19679 states to 19679 states and 48449 transitions. [2021-07-13 20:13:08,059 INFO L78 Accepts]: Start accepts. Automaton has 19679 states and 48449 transitions. Word has length 65 [2021-07-13 20:13:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:08,059 INFO L482 AbstractCegarLoop]: Abstraction has 19679 states and 48449 transitions. [2021-07-13 20:13:08,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 19679 states and 48449 transitions. [2021-07-13 20:13:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:08,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:08,083 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:08,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:08,283 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1452673067, now seen corresponding path program 106 times [2021-07-13 20:13:08,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:08,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381635923] [2021-07-13 20:13:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:08,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:08,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381635923] [2021-07-13 20:13:08,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381635923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139380743] [2021-07-13 20:13:08,647 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 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 [2021-07-13 20:13:08,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:08,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:09,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:09,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:09,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:09,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:09,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:09,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:09,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:09,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:09,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139380743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:09,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:09,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-07-13 20:13:09,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704128066] [2021-07-13 20:13:09,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:13:09,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:13:09,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:13:09,463 INFO L87 Difference]: Start difference. First operand 19679 states and 48449 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:11,024 INFO L93 Difference]: Finished difference Result 28103 states and 69577 transitions. [2021-07-13 20:13:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:13:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:11,073 INFO L225 Difference]: With dead ends: 28103 [2021-07-13 20:13:11,074 INFO L226 Difference]: Without dead ends: 28015 [2021-07-13 20:13:11,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1450.9ms TimeCoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:13:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28015 states. [2021-07-13 20:13:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28015 to 19743. [2021-07-13 20:13:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19743 states, 19742 states have (on average 2.462212541789079) internal successors, (48609), 19742 states have internal predecessors, (48609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19743 states to 19743 states and 48609 transitions. [2021-07-13 20:13:11,483 INFO L78 Accepts]: Start accepts. Automaton has 19743 states and 48609 transitions. Word has length 65 [2021-07-13 20:13:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:11,483 INFO L482 AbstractCegarLoop]: Abstraction has 19743 states and 48609 transitions. [2021-07-13 20:13:11,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 19743 states and 48609 transitions. [2021-07-13 20:13:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:11,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:11,506 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:11,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:13:11,706 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:11,707 INFO L82 PathProgramCache]: Analyzing trace with hash 416913877, now seen corresponding path program 107 times [2021-07-13 20:13:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:11,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282850139] [2021-07-13 20:13:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:12,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282850139] [2021-07-13 20:13:12,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282850139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931957784] [2021-07-13 20:13:12,064 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 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 [2021-07-13 20:13:12,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:13:12,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:13:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:12,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:12,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-07-13 20:13:13,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:13,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:13,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:13,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-07-13 20:13:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:13,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931957784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:13,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:13,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-07-13 20:13:13,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931005211] [2021-07-13 20:13:13,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:13:13,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:13:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:13:13,074 INFO L87 Difference]: Start difference. First operand 19743 states and 48609 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:16,638 INFO L93 Difference]: Finished difference Result 27223 states and 67356 transitions. [2021-07-13 20:13:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:13:16,639 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:16,687 INFO L225 Difference]: With dead ends: 27223 [2021-07-13 20:13:16,687 INFO L226 Difference]: Without dead ends: 26743 [2021-07-13 20:13:16,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2637.7ms TimeCoverageRelationStatistics Valid=355, Invalid=3805, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:13:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26743 states. [2021-07-13 20:13:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26743 to 19999. [2021-07-13 20:13:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19999 states, 19998 states have (on average 2.4622962296229622) internal successors, (49241), 19998 states have internal predecessors, (49241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19999 states to 19999 states and 49241 transitions. [2021-07-13 20:13:17,027 INFO L78 Accepts]: Start accepts. Automaton has 19999 states and 49241 transitions. Word has length 65 [2021-07-13 20:13:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:17,027 INFO L482 AbstractCegarLoop]: Abstraction has 19999 states and 49241 transitions. [2021-07-13 20:13:17,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19999 states and 49241 transitions. [2021-07-13 20:13:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:17,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:17,050 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:17,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:13:17,252 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:17,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1215526869, now seen corresponding path program 108 times [2021-07-13 20:13:17,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:17,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814544341] [2021-07-13 20:13:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:17,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:17,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814544341] [2021-07-13 20:13:17,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814544341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:17,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139614728] [2021-07-13 20:13:17,615 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 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 [2021-07-13 20:13:17,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:13:17,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:17,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:18,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:18,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:18,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:18,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:18,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:18,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:18,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:18,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:18,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:18,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:18,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139614728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:18,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:18,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-07-13 20:13:18,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692274821] [2021-07-13 20:13:18,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:18,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:18,567 INFO L87 Difference]: Start difference. First operand 19999 states and 49241 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:20,641 INFO L93 Difference]: Finished difference Result 34399 states and 85414 transitions. [2021-07-13 20:13:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:13:20,642 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:20,702 INFO L225 Difference]: With dead ends: 34399 [2021-07-13 20:13:20,702 INFO L226 Difference]: Without dead ends: 34119 [2021-07-13 20:13:20,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1533.3ms TimeCoverageRelationStatistics Valid=342, Invalid=3080, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:13:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34119 states. [2021-07-13 20:13:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34119 to 20975. [2021-07-13 20:13:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20975 states, 20974 states have (on average 2.4640507294745877) internal successors, (51681), 20974 states have internal predecessors, (51681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20975 states to 20975 states and 51681 transitions. [2021-07-13 20:13:21,239 INFO L78 Accepts]: Start accepts. Automaton has 20975 states and 51681 transitions. Word has length 65 [2021-07-13 20:13:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:21,239 INFO L482 AbstractCegarLoop]: Abstraction has 20975 states and 51681 transitions. [2021-07-13 20:13:21,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 20975 states and 51681 transitions. [2021-07-13 20:13:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:21,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:21,266 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:21,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:13:21,466 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash -147720235, now seen corresponding path program 109 times [2021-07-13 20:13:21,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:21,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624238825] [2021-07-13 20:13:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:13:21,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:21,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624238825] [2021-07-13 20:13:21,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624238825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16528915] [2021-07-13 20:13:21,754 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 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 [2021-07-13 20:13:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:21,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:22,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:22,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:22,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:22,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:22,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:22,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16528915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:22,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:22,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 28 [2021-07-13 20:13:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654297735] [2021-07-13 20:13:22,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:13:22,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:13:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:13:22,471 INFO L87 Difference]: Start difference. First operand 20975 states and 51681 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:23,700 INFO L93 Difference]: Finished difference Result 25435 states and 62776 transitions. [2021-07-13 20:13:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:13:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:23,745 INFO L225 Difference]: With dead ends: 25435 [2021-07-13 20:13:23,745 INFO L226 Difference]: Without dead ends: 25335 [2021-07-13 20:13:23,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1213.4ms TimeCoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:13:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-07-13 20:13:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 21167. [2021-07-13 20:13:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21167 states, 21166 states have (on average 2.463904374940943) internal successors, (52151), 21166 states have internal predecessors, (52151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21167 states to 21167 states and 52151 transitions. [2021-07-13 20:13:24,160 INFO L78 Accepts]: Start accepts. Automaton has 21167 states and 52151 transitions. Word has length 65 [2021-07-13 20:13:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:24,160 INFO L482 AbstractCegarLoop]: Abstraction has 21167 states and 52151 transitions. [2021-07-13 20:13:24,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 21167 states and 52151 transitions. [2021-07-13 20:13:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:24,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:24,185 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:24,386 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1399300565, now seen corresponding path program 110 times [2021-07-13 20:13:24,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35664179] [2021-07-13 20:13:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:24,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:24,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35664179] [2021-07-13 20:13:24,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35664179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:24,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40070417] [2021-07-13 20:13:24,751 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 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 [2021-07-13 20:13:24,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:24,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:24,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:25,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:25,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:25,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:25,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:25,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:25,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:25,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:25,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40070417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:25,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:25,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-07-13 20:13:25,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409100214] [2021-07-13 20:13:25,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:25,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:25,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:25,546 INFO L87 Difference]: Start difference. First operand 21167 states and 52151 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:26,919 INFO L93 Difference]: Finished difference Result 31631 states and 78302 transitions. [2021-07-13 20:13:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:13:26,920 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:26,971 INFO L225 Difference]: With dead ends: 31631 [2021-07-13 20:13:26,971 INFO L226 Difference]: Without dead ends: 31543 [2021-07-13 20:13:26,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1432.2ms TimeCoverageRelationStatistics Valid=309, Invalid=2771, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:13:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31543 states. [2021-07-13 20:13:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31543 to 21103. [2021-07-13 20:13:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21103 states, 21102 states have (on average 2.463794900957255) internal successors, (51991), 21102 states have internal predecessors, (51991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21103 states to 21103 states and 51991 transitions. [2021-07-13 20:13:27,428 INFO L78 Accepts]: Start accepts. Automaton has 21103 states and 51991 transitions. Word has length 65 [2021-07-13 20:13:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:27,429 INFO L482 AbstractCegarLoop]: Abstraction has 21103 states and 51991 transitions. [2021-07-13 20:13:27,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21103 states and 51991 transitions. [2021-07-13 20:13:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:27,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:27,454 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:27,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 20:13:27,654 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1026079787, now seen corresponding path program 111 times [2021-07-13 20:13:27,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:27,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112364964] [2021-07-13 20:13:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:28,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112364964] [2021-07-13 20:13:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112364964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841633184] [2021-07-13 20:13:28,019 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 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 [2021-07-13 20:13:28,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:13:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:28,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:28,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:28,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:28,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:28,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:28,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:28,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:28,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:28,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841633184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:28,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:28,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-07-13 20:13:28,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246218206] [2021-07-13 20:13:28,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:28,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:28,804 INFO L87 Difference]: Start difference. First operand 21103 states and 51991 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:30,053 INFO L93 Difference]: Finished difference Result 29239 states and 72271 transitions. [2021-07-13 20:13:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:13:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:30,112 INFO L225 Difference]: With dead ends: 29239 [2021-07-13 20:13:30,112 INFO L226 Difference]: Without dead ends: 29199 [2021-07-13 20:13:30,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1396.0ms TimeCoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:13:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29199 states. [2021-07-13 20:13:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29199 to 21103. [2021-07-13 20:13:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21103 states, 21102 states have (on average 2.463794900957255) internal successors, (51991), 21102 states have internal predecessors, (51991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21103 states to 21103 states and 51991 transitions. [2021-07-13 20:13:30,619 INFO L78 Accepts]: Start accepts. Automaton has 21103 states and 51991 transitions. Word has length 65 [2021-07-13 20:13:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:30,619 INFO L482 AbstractCegarLoop]: Abstraction has 21103 states and 51991 transitions. [2021-07-13 20:13:30,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 21103 states and 51991 transitions. [2021-07-13 20:13:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:30,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:30,647 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:30,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:30,847 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash -625141291, now seen corresponding path program 112 times [2021-07-13 20:13:30,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:30,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074578417] [2021-07-13 20:13:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:31,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:31,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074578417] [2021-07-13 20:13:31,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074578417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243886875] [2021-07-13 20:13:31,152 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 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 [2021-07-13 20:13:31,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:31,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:31,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:31,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:31,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:31,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:31,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:31,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:31,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:31,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243886875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:31,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 28 [2021-07-13 20:13:31,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057325491] [2021-07-13 20:13:31,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:13:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:13:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:13:31,869 INFO L87 Difference]: Start difference. First operand 21103 states and 51991 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:33,651 INFO L93 Difference]: Finished difference Result 30947 states and 76274 transitions. [2021-07-13 20:13:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:13:33,652 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:33,709 INFO L225 Difference]: With dead ends: 30947 [2021-07-13 20:13:33,709 INFO L226 Difference]: Without dead ends: 30535 [2021-07-13 20:13:33,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1374.1ms TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:13:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30535 states. [2021-07-13 20:13:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30535 to 22239. [2021-07-13 20:13:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22239 states, 22238 states have (on average 2.4656443924813383) internal successors, (54831), 22238 states have internal predecessors, (54831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 54831 transitions. [2021-07-13 20:13:34,184 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 54831 transitions. Word has length 65 [2021-07-13 20:13:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:34,184 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 54831 transitions. [2021-07-13 20:13:34,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 54831 transitions. [2021-07-13 20:13:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:34,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:34,212 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:34,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:13:34,412 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash 921879509, now seen corresponding path program 113 times [2021-07-13 20:13:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:34,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429802175] [2021-07-13 20:13:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:34,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:34,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429802175] [2021-07-13 20:13:34,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429802175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:34,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973630429] [2021-07-13 20:13:34,780 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 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 [2021-07-13 20:13:34,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:13:34,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:35,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:35,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:35,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:35,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:35,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:35,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:35,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:35,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:35,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973630429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:35,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:35,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-07-13 20:13:35,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544339820] [2021-07-13 20:13:35,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:13:35,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:35,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:13:35,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:13:35,536 INFO L87 Difference]: Start difference. First operand 22239 states and 54831 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:37,319 INFO L93 Difference]: Finished difference Result 34023 states and 84647 transitions. [2021-07-13 20:13:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:13:37,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:37,386 INFO L225 Difference]: With dead ends: 34023 [2021-07-13 20:13:37,386 INFO L226 Difference]: Without dead ends: 33743 [2021-07-13 20:13:37,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1460.9ms TimeCoverageRelationStatistics Valid=332, Invalid=2860, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:13:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33743 states. [2021-07-13 20:13:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33743 to 22303. [2021-07-13 20:13:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22303 states, 22302 states have (on average 2.4657429826921353) internal successors, (54991), 22302 states have internal predecessors, (54991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22303 states to 22303 states and 54991 transitions. [2021-07-13 20:13:37,811 INFO L78 Accepts]: Start accepts. Automaton has 22303 states and 54991 transitions. Word has length 65 [2021-07-13 20:13:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:37,811 INFO L482 AbstractCegarLoop]: Abstraction has 22303 states and 54991 transitions. [2021-07-13 20:13:37,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 22303 states and 54991 transitions. [2021-07-13 20:13:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:37,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:37,840 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:38,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:38,045 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1503500843, now seen corresponding path program 114 times [2021-07-13 20:13:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:38,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143849003] [2021-07-13 20:13:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:38,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:38,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143849003] [2021-07-13 20:13:38,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143849003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:38,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357931554] [2021-07-13 20:13:38,436 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 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 [2021-07-13 20:13:38,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:13:38,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:38,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:39,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:39,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:39,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:39,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:39,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:39,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:39,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:39,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357931554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:39,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:39,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-07-13 20:13:39,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787157346] [2021-07-13 20:13:39,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:13:39,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:13:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:13:39,194 INFO L87 Difference]: Start difference. First operand 22303 states and 54991 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:40,866 INFO L93 Difference]: Finished difference Result 29095 states and 71967 transitions. [2021-07-13 20:13:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:13:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:40,921 INFO L225 Difference]: With dead ends: 29095 [2021-07-13 20:13:40,921 INFO L226 Difference]: Without dead ends: 29055 [2021-07-13 20:13:40,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1404.1ms TimeCoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:13:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29055 states. [2021-07-13 20:13:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29055 to 22319. [2021-07-13 20:13:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22319 states, 22318 states have (on average 2.465767541894435) internal successors, (55031), 22318 states have internal predecessors, (55031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22319 states to 22319 states and 55031 transitions. [2021-07-13 20:13:41,362 INFO L78 Accepts]: Start accepts. Automaton has 22319 states and 55031 transitions. Word has length 65 [2021-07-13 20:13:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:41,362 INFO L482 AbstractCegarLoop]: Abstraction has 22319 states and 55031 transitions. [2021-07-13 20:13:41,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22319 states and 55031 transitions. [2021-07-13 20:13:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:41,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:41,389 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:41,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:41,589 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:41,589 INFO L82 PathProgramCache]: Analyzing trace with hash 363466709, now seen corresponding path program 115 times [2021-07-13 20:13:41,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:41,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410735361] [2021-07-13 20:13:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:41,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:41,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410735361] [2021-07-13 20:13:41,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410735361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:41,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140235475] [2021-07-13 20:13:41,967 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 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 [2021-07-13 20:13:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:42,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:42,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:42,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:42,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:42,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:42,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:42,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:42,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140235475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:42,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:42,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-07-13 20:13:42,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724510001] [2021-07-13 20:13:42,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:13:42,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:13:42,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:13:42,682 INFO L87 Difference]: Start difference. First operand 22319 states and 55031 transitions. Second operand has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:44,134 INFO L93 Difference]: Finished difference Result 32175 states and 79699 transitions. [2021-07-13 20:13:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:13:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:44,188 INFO L225 Difference]: With dead ends: 32175 [2021-07-13 20:13:44,189 INFO L226 Difference]: Without dead ends: 32111 [2021-07-13 20:13:44,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1410.0ms TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:13:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32111 states. [2021-07-13 20:13:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32111 to 22511. [2021-07-13 20:13:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22511 states, 22510 states have (on average 2.4660595290981786) internal successors, (55511), 22510 states have internal predecessors, (55511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22511 states to 22511 states and 55511 transitions. [2021-07-13 20:13:44,644 INFO L78 Accepts]: Start accepts. Automaton has 22511 states and 55511 transitions. Word has length 65 [2021-07-13 20:13:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:44,645 INFO L482 AbstractCegarLoop]: Abstraction has 22511 states and 55511 transitions. [2021-07-13 20:13:44,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22511 states and 55511 transitions. [2021-07-13 20:13:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:44,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:44,670 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:44,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-13 20:13:44,871 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1821229611, now seen corresponding path program 116 times [2021-07-13 20:13:44,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:44,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389636463] [2021-07-13 20:13:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:45,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:45,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389636463] [2021-07-13 20:13:45,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389636463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:45,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557471090] [2021-07-13 20:13:45,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:13:45,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:45,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:45,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:45,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:45,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:45,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:45,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:45,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:45,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:45,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557471090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:45,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:45,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-07-13 20:13:45,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576135372] [2021-07-13 20:13:45,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:13:45,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:45,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:13:45,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:13:45,939 INFO L87 Difference]: Start difference. First operand 22511 states and 55511 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:47,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:47,854 INFO L93 Difference]: Finished difference Result 31275 states and 77190 transitions. [2021-07-13 20:13:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:13:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:47,910 INFO L225 Difference]: With dead ends: 31275 [2021-07-13 20:13:47,910 INFO L226 Difference]: Without dead ends: 30823 [2021-07-13 20:13:47,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1676.0ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:13:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30823 states. [2021-07-13 20:13:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30823 to 25295. [2021-07-13 20:13:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25295 states, 25294 states have (on average 2.4637068079386415) internal successors, (62317), 25294 states have internal predecessors, (62317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25295 states to 25295 states and 62317 transitions. [2021-07-13 20:13:48,445 INFO L78 Accepts]: Start accepts. Automaton has 25295 states and 62317 transitions. Word has length 65 [2021-07-13 20:13:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:48,445 INFO L482 AbstractCegarLoop]: Abstraction has 25295 states and 62317 transitions. [2021-07-13 20:13:48,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25295 states and 62317 transitions. [2021-07-13 20:13:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:48,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:48,477 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:48,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:13:48,678 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash -243267115, now seen corresponding path program 117 times [2021-07-13 20:13:48,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:48,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735914701] [2021-07-13 20:13:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 153 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 20:13:48,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:48,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735914701] [2021-07-13 20:13:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735914701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:48,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870992002] [2021-07-13 20:13:48,935 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 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 [2021-07-13 20:13:48,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:13:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:49,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:49,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:49,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:49,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:49,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:49,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 15 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:49,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870992002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:49,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:49,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 25 [2021-07-13 20:13:49,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103982345] [2021-07-13 20:13:49,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:13:49,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:49,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:13:49,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:13:49,550 INFO L87 Difference]: Start difference. First operand 25295 states and 62317 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:51,985 INFO L93 Difference]: Finished difference Result 32375 states and 79952 transitions. [2021-07-13 20:13:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:13:51,985 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:52,041 INFO L225 Difference]: With dead ends: 32375 [2021-07-13 20:13:52,041 INFO L226 Difference]: Without dead ends: 31959 [2021-07-13 20:13:52,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1749.1ms TimeCoverageRelationStatistics Valid=338, Invalid=2742, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:13:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31959 states. [2021-07-13 20:13:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31959 to 25695. [2021-07-13 20:13:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25695 states, 25694 states have (on average 2.4642718144313847) internal successors, (63317), 25694 states have internal predecessors, (63317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25695 states to 25695 states and 63317 transitions. [2021-07-13 20:13:52,581 INFO L78 Accepts]: Start accepts. Automaton has 25695 states and 63317 transitions. Word has length 65 [2021-07-13 20:13:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:52,581 INFO L482 AbstractCegarLoop]: Abstraction has 25695 states and 63317 transitions. [2021-07-13 20:13:52,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 25695 states and 63317 transitions. [2021-07-13 20:13:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:52,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:52,612 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:52,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:52,813 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash 555299797, now seen corresponding path program 118 times [2021-07-13 20:13:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:52,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861944443] [2021-07-13 20:13:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:53,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861944443] [2021-07-13 20:13:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861944443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366053572] [2021-07-13 20:13:53,107 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:53,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:53,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:53,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:53,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:53,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:53,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:53,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 11 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366053572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:53,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:53,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 26 [2021-07-13 20:13:53,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641949097] [2021-07-13 20:13:53,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:13:53,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:13:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:13:53,731 INFO L87 Difference]: Start difference. First operand 25695 states and 63317 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:56,329 INFO L93 Difference]: Finished difference Result 34791 states and 85810 transitions. [2021-07-13 20:13:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:13:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:56,388 INFO L225 Difference]: With dead ends: 34791 [2021-07-13 20:13:56,388 INFO L226 Difference]: Without dead ends: 34231 [2021-07-13 20:13:56,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1941.3ms TimeCoverageRelationStatistics Valid=361, Invalid=3179, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:13:56,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34231 states. [2021-07-13 20:13:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34231 to 25919. [2021-07-13 20:13:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25919 states, 25918 states have (on average 2.4645806003549655) internal successors, (63877), 25918 states have internal predecessors, (63877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25919 states to 25919 states and 63877 transitions. [2021-07-13 20:13:56,835 INFO L78 Accepts]: Start accepts. Automaton has 25919 states and 63877 transitions. Word has length 65 [2021-07-13 20:13:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:56,835 INFO L482 AbstractCegarLoop]: Abstraction has 25919 states and 63877 transitions. [2021-07-13 20:13:56,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 25919 states and 63877 transitions. [2021-07-13 20:13:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:56,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:56,865 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:57,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:13:57,065 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:57,066 INFO L82 PathProgramCache]: Analyzing trace with hash 685620181, now seen corresponding path program 119 times [2021-07-13 20:13:57,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:57,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995917955] [2021-07-13 20:13:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:13:57,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995917955] [2021-07-13 20:13:57,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995917955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:57,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251727542] [2021-07-13 20:13:57,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:57,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:13:57,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:57,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:57,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:13:57,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:57,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:57,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:57,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:13:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 12 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:57,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251727542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:57,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:57,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 25 [2021-07-13 20:13:57,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032852549] [2021-07-13 20:13:57,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:13:57,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:57,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:13:57,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:13:57,965 INFO L87 Difference]: Start difference. First operand 25919 states and 63877 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:59,192 INFO L93 Difference]: Finished difference Result 33819 states and 83530 transitions. [2021-07-13 20:13:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:13:59,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:13:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:59,254 INFO L225 Difference]: With dead ends: 33819 [2021-07-13 20:13:59,254 INFO L226 Difference]: Without dead ends: 33719 [2021-07-13 20:13:59,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1155.4ms TimeCoverageRelationStatistics Valid=221, Invalid=2035, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:13:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33719 states. [2021-07-13 20:13:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33719 to 26959. [2021-07-13 20:13:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26959 states, 26958 states have (on average 2.4659470287113288) internal successors, (66477), 26958 states have internal predecessors, (66477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26959 states to 26959 states and 66477 transitions. [2021-07-13 20:13:59,820 INFO L78 Accepts]: Start accepts. Automaton has 26959 states and 66477 transitions. Word has length 65 [2021-07-13 20:13:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:59,820 INFO L482 AbstractCegarLoop]: Abstraction has 26959 states and 66477 transitions. [2021-07-13 20:13:59,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 26959 states and 66477 transitions. [2021-07-13 20:13:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:13:59,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:59,850 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:00,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:00,052 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash 869393877, now seen corresponding path program 120 times [2021-07-13 20:14:00,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:00,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820467090] [2021-07-13 20:14:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:00,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:00,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820467090] [2021-07-13 20:14:00,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820467090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:00,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031567154] [2021-07-13 20:14:00,360 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:00,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:14:00,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:00,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:14:00,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:14:00,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:00,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:00,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:00,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:14:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:00,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031567154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:00,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:00,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 26 [2021-07-13 20:14:00,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655976476] [2021-07-13 20:14:00,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:14:00,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:00,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:14:00,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:14:00,998 INFO L87 Difference]: Start difference. First operand 26959 states and 66477 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:02,628 INFO L93 Difference]: Finished difference Result 36567 states and 90236 transitions. [2021-07-13 20:14:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:14:02,628 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:14:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:02,691 INFO L225 Difference]: With dead ends: 36567 [2021-07-13 20:14:02,692 INFO L226 Difference]: Without dead ends: 36183 [2021-07-13 20:14:02,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1269.7ms TimeCoverageRelationStatistics Valid=230, Invalid=2220, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:14:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-07-13 20:14:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 28527. [2021-07-13 20:14:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28527 states, 28526 states have (on average 2.4672579401247985) internal successors, (70381), 28526 states have internal predecessors, (70381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28527 states to 28527 states and 70381 transitions. [2021-07-13 20:14:03,294 INFO L78 Accepts]: Start accepts. Automaton has 28527 states and 70381 transitions. Word has length 65 [2021-07-13 20:14:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:03,294 INFO L482 AbstractCegarLoop]: Abstraction has 28527 states and 70381 transitions. [2021-07-13 20:14:03,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28527 states and 70381 transitions. [2021-07-13 20:14:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:03,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:03,329 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:03,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:14:03,540 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1137333803, now seen corresponding path program 121 times [2021-07-13 20:14:03,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:03,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132627833] [2021-07-13 20:14:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:03,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132627833] [2021-07-13 20:14:03,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132627833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859172091] [2021-07-13 20:14:03,865 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:14:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:04,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:14:04,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:04,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:04,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:04,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:14:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:04,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859172091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:04,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:04,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 27 [2021-07-13 20:14:04,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194524650] [2021-07-13 20:14:04,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:14:04,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:04,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:14:04,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:14:04,502 INFO L87 Difference]: Start difference. First operand 28527 states and 70381 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:05,932 INFO L93 Difference]: Finished difference Result 41391 states and 102480 transitions. [2021-07-13 20:14:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:14:05,933 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:14:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:06,010 INFO L225 Difference]: With dead ends: 41391 [2021-07-13 20:14:06,011 INFO L226 Difference]: Without dead ends: 41303 [2021-07-13 20:14:06,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1320.8ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:14:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41303 states. [2021-07-13 20:14:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41303 to 28047. [2021-07-13 20:14:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28047 states, 28046 states have (on average 2.4666975682806815) internal successors, (69181), 28046 states have internal predecessors, (69181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28047 states to 28047 states and 69181 transitions. [2021-07-13 20:14:06,677 INFO L78 Accepts]: Start accepts. Automaton has 28047 states and 69181 transitions. Word has length 65 [2021-07-13 20:14:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:06,677 INFO L482 AbstractCegarLoop]: Abstraction has 28047 states and 69181 transitions. [2021-07-13 20:14:06,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28047 states and 69181 transitions. [2021-07-13 20:14:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:06,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:06,711 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:06,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:06,913 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash -8965675, now seen corresponding path program 122 times [2021-07-13 20:14:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:06,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408313504] [2021-07-13 20:14:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:07,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:07,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408313504] [2021-07-13 20:14:07,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408313504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:07,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868957810] [2021-07-13 20:14:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:07,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:07,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:07,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:14:07,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:07,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:07,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:14:07,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:07,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:07,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:07,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:14:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:07,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868957810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:07,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:07,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2021-07-13 20:14:07,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025101762] [2021-07-13 20:14:07,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:14:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:07,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:14:07,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:14:07,964 INFO L87 Difference]: Start difference. First operand 28047 states and 69181 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:09,366 INFO L93 Difference]: Finished difference Result 39047 states and 96941 transitions. [2021-07-13 20:14:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:14:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:14:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:09,446 INFO L225 Difference]: With dead ends: 39047 [2021-07-13 20:14:09,446 INFO L226 Difference]: Without dead ends: 38863 [2021-07-13 20:14:09,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1397.0ms TimeCoverageRelationStatistics Valid=318, Invalid=2544, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:14:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38863 states. [2021-07-13 20:14:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38863 to 28127. [2021-07-13 20:14:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28127 states, 28126 states have (on average 2.466792291829624) internal successors, (69381), 28126 states have internal predecessors, (69381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28127 states to 28127 states and 69381 transitions. [2021-07-13 20:14:10,105 INFO L78 Accepts]: Start accepts. Automaton has 28127 states and 69381 transitions. Word has length 65 [2021-07-13 20:14:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:10,105 INFO L482 AbstractCegarLoop]: Abstraction has 28127 states and 69381 transitions. [2021-07-13 20:14:10,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 28127 states and 69381 transitions. [2021-07-13 20:14:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:10,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:10,140 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:10,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 20:14:10,341 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:10,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1382256597, now seen corresponding path program 123 times [2021-07-13 20:14:10,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:10,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406197282] [2021-07-13 20:14:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:10,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:10,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406197282] [2021-07-13 20:14:10,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406197282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:10,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556195119] [2021-07-13 20:14:10,740 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:10,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:14:10,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:14:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:11,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:11,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:11,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 55 [2021-07-13 20:14:11,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:11,557 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:14:11,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:11,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:159, output treesize:7 [2021-07-13 20:14:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:11,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556195119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:11,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:11,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 25 [2021-07-13 20:14:11,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808119202] [2021-07-13 20:14:11,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:14:11,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:11,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:14:11,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:14:11,570 INFO L87 Difference]: Start difference. First operand 28127 states and 69381 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:14,770 INFO L93 Difference]: Finished difference Result 35719 states and 88144 transitions. [2021-07-13 20:14:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:14:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:14:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:14,964 INFO L225 Difference]: With dead ends: 35719 [2021-07-13 20:14:14,964 INFO L226 Difference]: Without dead ends: 35367 [2021-07-13 20:14:14,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1694.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1957, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35367 states. [2021-07-13 20:14:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35367 to 29039. [2021-07-13 20:14:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29039 states, 29038 states have (on average 2.467284248226462) internal successors, (71645), 29038 states have internal predecessors, (71645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29039 states to 29039 states and 71645 transitions. [2021-07-13 20:14:15,453 INFO L78 Accepts]: Start accepts. Automaton has 29039 states and 71645 transitions. Word has length 65 [2021-07-13 20:14:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:15,454 INFO L482 AbstractCegarLoop]: Abstraction has 29039 states and 71645 transitions. [2021-07-13 20:14:15,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 29039 states and 71645 transitions. [2021-07-13 20:14:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:15,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:15,494 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:15,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:14:15,694 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash -624471083, now seen corresponding path program 124 times [2021-07-13 20:14:15,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:15,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246411100] [2021-07-13 20:14:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:16,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246411100] [2021-07-13 20:14:16,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246411100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11576379] [2021-07-13 20:14:16,027 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:16,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:16,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:14:16,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:16,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:14:16,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:16,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:16,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:16,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:14:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11576379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:16,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:16,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 26 [2021-07-13 20:14:16,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908236571] [2021-07-13 20:14:16,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:14:16,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:14:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:14:16,646 INFO L87 Difference]: Start difference. First operand 29039 states and 71645 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:18,304 INFO L93 Difference]: Finished difference Result 40703 states and 100802 transitions. [2021-07-13 20:14:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:14:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:14:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:18,397 INFO L225 Difference]: With dead ends: 40703 [2021-07-13 20:14:18,397 INFO L226 Difference]: Without dead ends: 40615 [2021-07-13 20:14:18,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1263.4ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:14:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40615 states. [2021-07-13 20:14:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40615 to 28943. [2021-07-13 20:14:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28943 states, 28942 states have (on average 2.4671757307718885) internal successors, (71405), 28942 states have internal predecessors, (71405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28943 states to 28943 states and 71405 transitions. [2021-07-13 20:14:19,037 INFO L78 Accepts]: Start accepts. Automaton has 28943 states and 71405 transitions. Word has length 65 [2021-07-13 20:14:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:19,037 INFO L482 AbstractCegarLoop]: Abstraction has 28943 states and 71405 transitions. [2021-07-13 20:14:19,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 28943 states and 71405 transitions. [2021-07-13 20:14:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:19,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:19,083 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:19,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:19,307 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1135155157, now seen corresponding path program 125 times [2021-07-13 20:14:19,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:19,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951290739] [2021-07-13 20:14:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:19,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951290739] [2021-07-13 20:14:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951290739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:19,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946198111] [2021-07-13 20:14:19,653 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:19,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:14:19,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:14:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 44 [2021-07-13 20:14:24,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:24,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:118, output treesize:3 [2021-07-13 20:14:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:24,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946198111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:24,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:24,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-07-13 20:14:24,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019013562] [2021-07-13 20:14:24,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:24,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:24,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:24,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1211, Unknown=1, NotChecked=0, Total=1332 [2021-07-13 20:14:24,707 INFO L87 Difference]: Start difference. First operand 28943 states and 71405 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:02,431 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-07-13 20:15:12,686 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-07-13 20:15:56,946 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2021-07-13 20:16:10,214 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-07-13 20:17:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:22,807 INFO L93 Difference]: Finished difference Result 45435 states and 112338 transitions. [2021-07-13 20:17:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:17:22,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:17:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:22,887 INFO L225 Difference]: With dead ends: 45435 [2021-07-13 20:17:22,887 INFO L226 Difference]: Without dead ends: 44727 [2021-07-13 20:17:22,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 63665.2ms TimeCoverageRelationStatistics Valid=730, Invalid=8956, Unknown=16, NotChecked=0, Total=9702 [2021-07-13 20:17:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44727 states. [2021-07-13 20:17:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44727 to 29855. [2021-07-13 20:17:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29855 states, 29854 states have (on average 2.4705232129697863) internal successors, (73755), 29854 states have internal predecessors, (73755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29855 states to 29855 states and 73755 transitions. [2021-07-13 20:17:23,591 INFO L78 Accepts]: Start accepts. Automaton has 29855 states and 73755 transitions. Word has length 65 [2021-07-13 20:17:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:23,591 INFO L482 AbstractCegarLoop]: Abstraction has 29855 states and 73755 transitions. [2021-07-13 20:17:23,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 29855 states and 73755 transitions. [2021-07-13 20:17:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:17:23,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:23,634 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:23,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:23,834 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash 503897045, now seen corresponding path program 126 times [2021-07-13 20:17:23,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:23,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863744770] [2021-07-13 20:17:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:24,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:24,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863744770] [2021-07-13 20:17:24,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863744770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:24,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130633406] [2021-07-13 20:17:24,226 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:24,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:17:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:17:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:24,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:17:24,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:24,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:24,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:24,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:17:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:24,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130633406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:24,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:24,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2021-07-13 20:17:24,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139183562] [2021-07-13 20:17:24,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:17:24,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:24,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:17:24,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:17:24,908 INFO L87 Difference]: Start difference. First operand 29855 states and 73755 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:26,718 INFO L93 Difference]: Finished difference Result 41031 states and 101747 transitions. [2021-07-13 20:17:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:17:26,718 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:17:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:26,781 INFO L225 Difference]: With dead ends: 41031 [2021-07-13 20:17:26,781 INFO L226 Difference]: Without dead ends: 40943 [2021-07-13 20:17:26,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1433.6ms TimeCoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:17:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40943 states. [2021-07-13 20:17:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40943 to 29855. [2021-07-13 20:17:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29855 states, 29854 states have (on average 2.4705232129697863) internal successors, (73755), 29854 states have internal predecessors, (73755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29855 states to 29855 states and 73755 transitions. [2021-07-13 20:17:27,277 INFO L78 Accepts]: Start accepts. Automaton has 29855 states and 73755 transitions. Word has length 65 [2021-07-13 20:17:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:27,277 INFO L482 AbstractCegarLoop]: Abstraction has 29855 states and 73755 transitions. [2021-07-13 20:17:27,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 29855 states and 73755 transitions. [2021-07-13 20:17:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:17:27,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:27,315 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:27,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:27,524 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1880620501, now seen corresponding path program 127 times [2021-07-13 20:17:27,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:27,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453402748] [2021-07-13 20:17:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:27,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:27,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453402748] [2021-07-13 20:17:27,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453402748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:27,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871787243] [2021-07-13 20:17:27,907 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:17:27,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:28,406 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-07-13 20:17:28,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:17:28,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:28,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:28,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:28,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-07-13 20:17:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:28,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871787243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:28,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:28,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 27 [2021-07-13 20:17:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096290762] [2021-07-13 20:17:28,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:17:28,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:17:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:17:28,423 INFO L87 Difference]: Start difference. First operand 29855 states and 73755 transitions. Second operand has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:29,633 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-13 20:17:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:29,767 INFO L93 Difference]: Finished difference Result 38723 states and 95879 transitions. [2021-07-13 20:17:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:17:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 20:17:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:29,841 INFO L225 Difference]: With dead ends: 38723 [2021-07-13 20:17:29,841 INFO L226 Difference]: Without dead ends: 38687 [2021-07-13 20:17:29,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1368.6ms TimeCoverageRelationStatistics Valid=296, Invalid=2254, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38687 states. [2021-07-13 20:17:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38687 to 29887. [2021-07-13 20:17:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29887 states, 29886 states have (on average 2.470554774810948) internal successors, (73835), 29886 states have internal predecessors, (73835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29887 states to 29887 states and 73835 transitions. [2021-07-13 20:17:30,390 INFO L78 Accepts]: Start accepts. Automaton has 29887 states and 73835 transitions. Word has length 65 [2021-07-13 20:17:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:30,390 INFO L482 AbstractCegarLoop]: Abstraction has 29887 states and 73835 transitions. [2021-07-13 20:17:30,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29887 states and 73835 transitions. [2021-07-13 20:17:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:17:30,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:30,433 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:30,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:30,634 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1171032407, now seen corresponding path program 128 times [2021-07-13 20:17:30,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:30,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418640558] [2021-07-13 20:17:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 81 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:30,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:30,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418640558] [2021-07-13 20:17:30,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418640558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:30,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135028493] [2021-07-13 20:17:30,695 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:30,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:30,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:30,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:17:30,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 81 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:30,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135028493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:30,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:30,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 20:17:30,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299624797] [2021-07-13 20:17:30,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:17:30,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:17:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:17:30,824 INFO L87 Difference]: Start difference. First operand 29887 states and 73835 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:30,960 INFO L93 Difference]: Finished difference Result 32099 states and 79190 transitions. [2021-07-13 20:17:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:17:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-07-13 20:17:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:31,013 INFO L225 Difference]: With dead ends: 32099 [2021-07-13 20:17:31,013 INFO L226 Difference]: Without dead ends: 32091 [2021-07-13 20:17:31,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:17:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32091 states. [2021-07-13 20:17:31,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32091 to 30175. [2021-07-13 20:17:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30175 states, 30174 states have (on average 2.4713660767548222) internal successors, (74571), 30174 states have internal predecessors, (74571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30175 states to 30175 states and 74571 transitions. [2021-07-13 20:17:31,484 INFO L78 Accepts]: Start accepts. Automaton has 30175 states and 74571 transitions. Word has length 67 [2021-07-13 20:17:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:31,484 INFO L482 AbstractCegarLoop]: Abstraction has 30175 states and 74571 transitions. [2021-07-13 20:17:31,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30175 states and 74571 transitions. [2021-07-13 20:17:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:17:31,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:31,525 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:31,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:17:31,726 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1917971249, now seen corresponding path program 129 times [2021-07-13 20:17:31,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:31,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213976633] [2021-07-13 20:17:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 9 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:32,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:32,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213976633] [2021-07-13 20:17:32,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213976633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:32,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802812491] [2021-07-13 20:17:32,031 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:32,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:17:32,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:32,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:17:32,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:17:32,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:32,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:32,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:32,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:17:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:32,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802812491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:32,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:32,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 27 [2021-07-13 20:17:32,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784745173] [2021-07-13 20:17:32,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:17:32,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:17:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:17:32,905 INFO L87 Difference]: Start difference. First operand 30175 states and 74571 transitions. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:35,577 INFO L93 Difference]: Finished difference Result 48215 states and 119666 transitions. [2021-07-13 20:17:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:17:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-07-13 20:17:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:35,665 INFO L225 Difference]: With dead ends: 48215 [2021-07-13 20:17:35,665 INFO L226 Difference]: Without dead ends: 47591 [2021-07-13 20:17:35,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2205.3ms TimeCoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:17:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47591 states. [2021-07-13 20:17:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47591 to 32159. [2021-07-13 20:17:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32159 states, 32158 states have (on average 2.4716400273648857) internal successors, (79483), 32158 states have internal predecessors, (79483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32159 states to 32159 states and 79483 transitions. [2021-07-13 20:17:36,423 INFO L78 Accepts]: Start accepts. Automaton has 32159 states and 79483 transitions. Word has length 69 [2021-07-13 20:17:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:36,423 INFO L482 AbstractCegarLoop]: Abstraction has 32159 states and 79483 transitions. [2021-07-13 20:17:36,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32159 states and 79483 transitions. [2021-07-13 20:17:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:17:36,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:36,465 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:36,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 20:17:36,665 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:36,665 INFO L82 PathProgramCache]: Analyzing trace with hash -258255055, now seen corresponding path program 130 times [2021-07-13 20:17:36,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:36,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076595448] [2021-07-13 20:17:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 9 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:37,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:37,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076595448] [2021-07-13 20:17:37,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076595448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:37,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992611185] [2021-07-13 20:17:37,014 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:37,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:17:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:37,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-13 20:17:37,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:37,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:37,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:37,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-13 20:17:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 9 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:37,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992611185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:37,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:37,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 28 [2021-07-13 20:17:37,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277245909] [2021-07-13 20:17:37,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:17:37,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:17:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:17:37,704 INFO L87 Difference]: Start difference. First operand 32159 states and 79483 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:41,283 INFO L93 Difference]: Finished difference Result 47403 states and 117875 transitions. [2021-07-13 20:17:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:17:41,284 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-07-13 20:17:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:41,371 INFO L225 Difference]: With dead ends: 47403 [2021-07-13 20:17:41,372 INFO L226 Difference]: Without dead ends: 47199 [2021-07-13 20:17:41,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 3138.3ms TimeCoverageRelationStatistics Valid=609, Invalid=4793, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:17:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47199 states. [2021-07-13 20:17:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47199 to 32319. [2021-07-13 20:17:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32319 states, 32318 states have (on average 2.471780431957423) internal successors, (79883), 32318 states have internal predecessors, (79883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32319 states to 32319 states and 79883 transitions. [2021-07-13 20:17:42,243 INFO L78 Accepts]: Start accepts. Automaton has 32319 states and 79883 transitions. Word has length 69 [2021-07-13 20:17:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:42,243 INFO L482 AbstractCegarLoop]: Abstraction has 32319 states and 79883 transitions. [2021-07-13 20:17:42,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 32319 states and 79883 transitions. [2021-07-13 20:17:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:17:42,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:42,288 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:42,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:17:42,489 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1900906419, now seen corresponding path program 131 times [2021-07-13 20:17:42,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:42,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651024134] [2021-07-13 20:17:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:42,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:42,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651024134] [2021-07-13 20:17:42,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651024134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:42,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49787738] [2021-07-13 20:17:42,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:42,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:17:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:42,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:17:42,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:43,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:43,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:43,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:17:43,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:43,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:43,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:43,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:17:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 5 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:43,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49787738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:43,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:43,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:17:43,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271403103] [2021-07-13 20:17:43,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:43,911 INFO L87 Difference]: Start difference. First operand 32319 states and 79883 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:46,497 INFO L93 Difference]: Finished difference Result 52087 states and 129267 transitions. [2021-07-13 20:17:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:17:46,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:17:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:46,609 INFO L225 Difference]: With dead ends: 52087 [2021-07-13 20:17:46,610 INFO L226 Difference]: Without dead ends: 52047 [2021-07-13 20:17:46,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1865.3ms TimeCoverageRelationStatistics Valid=400, Invalid=4292, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:17:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52047 states. [2021-07-13 20:17:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52047 to 33215. [2021-07-13 20:17:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33215 states, 33214 states have (on average 2.47109652556151) internal successors, (82075), 33214 states have internal predecessors, (82075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33215 states to 33215 states and 82075 transitions. [2021-07-13 20:17:47,371 INFO L78 Accepts]: Start accepts. Automaton has 33215 states and 82075 transitions. Word has length 71 [2021-07-13 20:17:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:47,372 INFO L482 AbstractCegarLoop]: Abstraction has 33215 states and 82075 transitions. [2021-07-13 20:17:47,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33215 states and 82075 transitions. [2021-07-13 20:17:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:17:47,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:47,420 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:47,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:47,620 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:47,620 INFO L82 PathProgramCache]: Analyzing trace with hash 475670963, now seen corresponding path program 132 times [2021-07-13 20:17:47,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:47,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573439844] [2021-07-13 20:17:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:48,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:48,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573439844] [2021-07-13 20:17:48,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573439844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:48,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020483204] [2021-07-13 20:17:48,077 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:48,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:17:48,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:48,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:17:48,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:48,804 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 20:17:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:49,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:49,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:17:49,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:49,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:49,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:49,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:170, output treesize:7 [2021-07-13 20:17:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:49,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020483204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:49,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:49,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 38 [2021-07-13 20:17:49,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693582129] [2021-07-13 20:17:49,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:49,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:49,437 INFO L87 Difference]: Start difference. First operand 33215 states and 82075 transitions. Second operand has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:56,405 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-07-13 20:17:56,783 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-07-13 20:17:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:57,740 INFO L93 Difference]: Finished difference Result 58283 states and 144389 transitions. [2021-07-13 20:17:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:17:57,740 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:17:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:57,874 INFO L225 Difference]: With dead ends: 58283 [2021-07-13 20:17:57,874 INFO L226 Difference]: Without dead ends: 57443 [2021-07-13 20:17:57,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 5591.9ms TimeCoverageRelationStatistics Valid=685, Invalid=9415, Unknown=0, NotChecked=0, Total=10100 [2021-07-13 20:17:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57443 states. [2021-07-13 20:17:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57443 to 33855. [2021-07-13 20:17:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33855 states, 33854 states have (on average 2.470874933538134) internal successors, (83649), 33854 states have internal predecessors, (83649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33855 states to 33855 states and 83649 transitions. [2021-07-13 20:17:58,605 INFO L78 Accepts]: Start accepts. Automaton has 33855 states and 83649 transitions. Word has length 71 [2021-07-13 20:17:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:58,605 INFO L482 AbstractCegarLoop]: Abstraction has 33855 states and 83649 transitions. [2021-07-13 20:17:58,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 33855 states and 83649 transitions. [2021-07-13 20:17:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:17:58,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:58,652 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:58,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 20:17:58,852 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:58,852 INFO L82 PathProgramCache]: Analyzing trace with hash -584494157, now seen corresponding path program 133 times [2021-07-13 20:17:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:58,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571475221] [2021-07-13 20:17:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:59,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571475221] [2021-07-13 20:17:59,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571475221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176960413] [2021-07-13 20:17:59,219 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:59,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:17:59,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:00,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:00,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:18:00,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:00,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:00,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:00,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:18:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 14 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:00,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176960413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:00,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:00,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:18:00,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90001813] [2021-07-13 20:18:00,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:00,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:00,231 INFO L87 Difference]: Start difference. First operand 33855 states and 83649 transitions. Second operand has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:00,680 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-07-13 20:18:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:02,767 INFO L93 Difference]: Finished difference Result 53495 states and 133049 transitions. [2021-07-13 20:18:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:18:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:18:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:02,863 INFO L225 Difference]: With dead ends: 53495 [2021-07-13 20:18:02,863 INFO L226 Difference]: Without dead ends: 53311 [2021-07-13 20:18:02,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 2055.3ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:18:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53311 states. [2021-07-13 20:18:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53311 to 34159. [2021-07-13 20:18:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34159 states, 34158 states have (on average 2.4711341413431698) internal successors, (84409), 34158 states have internal predecessors, (84409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34159 states to 34159 states and 84409 transitions. [2021-07-13 20:18:03,604 INFO L78 Accepts]: Start accepts. Automaton has 34159 states and 84409 transitions. Word has length 71 [2021-07-13 20:18:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:03,604 INFO L482 AbstractCegarLoop]: Abstraction has 34159 states and 84409 transitions. [2021-07-13 20:18:03,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 34159 states and 84409 transitions. [2021-07-13 20:18:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:18:03,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:03,844 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:04,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:04,057 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1050795597, now seen corresponding path program 134 times [2021-07-13 20:18:04,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:04,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467505249] [2021-07-13 20:18:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:04,281 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-13 20:18:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:04,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:04,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467505249] [2021-07-13 20:18:04,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467505249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:04,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112151140] [2021-07-13 20:18:04,492 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:04,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:04,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:18:04,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:18:05,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:05,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:05,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:05,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:18:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 5 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:05,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112151140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:05,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:05,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-07-13 20:18:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933457237] [2021-07-13 20:18:05,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:05,557 INFO L87 Difference]: Start difference. First operand 34159 states and 84409 transitions. Second operand has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:07,869 INFO L93 Difference]: Finished difference Result 54951 states and 136441 transitions. [2021-07-13 20:18:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:18:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:18:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:07,974 INFO L225 Difference]: With dead ends: 54951 [2021-07-13 20:18:07,974 INFO L226 Difference]: Without dead ends: 54863 [2021-07-13 20:18:07,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1973.6ms TimeCoverageRelationStatistics Valid=379, Invalid=4043, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:18:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54863 states. [2021-07-13 20:18:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54863 to 33919. [2021-07-13 20:18:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33919 states, 33918 states have (on average 2.4709298897340646) internal successors, (83809), 33918 states have internal predecessors, (83809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33919 states to 33919 states and 83809 transitions. [2021-07-13 20:18:08,747 INFO L78 Accepts]: Start accepts. Automaton has 33919 states and 83809 transitions. Word has length 71 [2021-07-13 20:18:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:08,747 INFO L482 AbstractCegarLoop]: Abstraction has 33919 states and 83809 transitions. [2021-07-13 20:18:08,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 33919 states and 83809 transitions. [2021-07-13 20:18:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:18:08,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:08,793 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:08,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:08,994 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash -403180109, now seen corresponding path program 135 times [2021-07-13 20:18:08,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:08,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132540943] [2021-07-13 20:18:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:09,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:09,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132540943] [2021-07-13 20:18:09,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132540943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:09,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167077413] [2021-07-13 20:18:09,398 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:09,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:18:09,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:18:09,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:23,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:23,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 60 [2021-07-13 20:18:23,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:23,238 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-13 20:18:23,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:23,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:177, output treesize:7 [2021-07-13 20:18:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 5 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:23,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167077413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:23,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:23,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:18:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601408661] [2021-07-13 20:18:23,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:23,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1263, Unknown=4, NotChecked=0, Total=1406 [2021-07-13 20:18:23,252 INFO L87 Difference]: Start difference. First operand 33919 states and 83809 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:20,762 INFO L93 Difference]: Finished difference Result 52511 states and 130429 transitions. [2021-07-13 20:19:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:20,762 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:19:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:20,879 INFO L225 Difference]: With dead ends: 52511 [2021-07-13 20:19:20,879 INFO L226 Difference]: Without dead ends: 52079 [2021-07-13 20:19:20,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 18916.5ms TimeCoverageRelationStatistics Valid=398, Invalid=4289, Unknown=5, NotChecked=0, Total=4692 [2021-07-13 20:19:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52079 states. [2021-07-13 20:19:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52079 to 34335. [2021-07-13 20:19:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34335 states, 34334 states have (on average 2.4708161006582396) internal successors, (84833), 34334 states have internal predecessors, (84833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34335 states to 34335 states and 84833 transitions. [2021-07-13 20:19:21,597 INFO L78 Accepts]: Start accepts. Automaton has 34335 states and 84833 transitions. Word has length 71 [2021-07-13 20:19:21,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:21,597 INFO L482 AbstractCegarLoop]: Abstraction has 34335 states and 84833 transitions. [2021-07-13 20:19:21,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 34335 states and 84833 transitions. [2021-07-13 20:19:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:19:21,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:21,651 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:21,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:21,852 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 395386803, now seen corresponding path program 136 times [2021-07-13 20:19:21,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:21,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423201801] [2021-07-13 20:19:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:22,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423201801] [2021-07-13 20:19:22,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423201801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059093672] [2021-07-13 20:19:22,388 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:22,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:22,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:22,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:19:22,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:22,872 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:19:23,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:23,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:23,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:19:23,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:23,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:23,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:23,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:19:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 14 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:23,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059093672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:23,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:19:23,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720955102] [2021-07-13 20:19:23,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:23,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:23,513 INFO L87 Difference]: Start difference. First operand 34335 states and 84833 transitions. Second operand has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:26,217 INFO L93 Difference]: Finished difference Result 50775 states and 125929 transitions. [2021-07-13 20:19:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:19:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:26,329 INFO L225 Difference]: With dead ends: 50775 [2021-07-13 20:19:26,329 INFO L226 Difference]: Without dead ends: 50735 [2021-07-13 20:19:26,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 2147.8ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:19:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50735 states. [2021-07-13 20:19:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50735 to 34367. [2021-07-13 20:19:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34367 states, 34366 states have (on average 2.4708432753302683) internal successors, (84913), 34366 states have internal predecessors, (84913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34367 states to 34367 states and 84913 transitions. [2021-07-13 20:19:27,046 INFO L78 Accepts]: Start accepts. Automaton has 34367 states and 84913 transitions. Word has length 71 [2021-07-13 20:19:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:27,046 INFO L482 AbstractCegarLoop]: Abstraction has 34367 states and 84913 transitions. [2021-07-13 20:19:27,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 34367 states and 84913 transitions. [2021-07-13 20:19:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:19:27,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:27,094 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:27,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:27,295 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash -613231693, now seen corresponding path program 137 times [2021-07-13 20:19:27,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:27,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589816832] [2021-07-13 20:19:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:27,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:27,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589816832] [2021-07-13 20:19:27,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589816832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:27,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36702067] [2021-07-13 20:19:27,824 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:27,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:19:27,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:27,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:19:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:28,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:28,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:19:28,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:28,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:28,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:28,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:19:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36702067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:28,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:19:28,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895961390] [2021-07-13 20:19:28,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:28,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:28,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:28,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:28,991 INFO L87 Difference]: Start difference. First operand 34367 states and 84913 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:31,568 INFO L93 Difference]: Finished difference Result 64583 states and 160781 transitions. [2021-07-13 20:19:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:31,569 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:19:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:31,703 INFO L225 Difference]: With dead ends: 64583 [2021-07-13 20:19:31,703 INFO L226 Difference]: Without dead ends: 64351 [2021-07-13 20:19:31,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2055.9ms TimeCoverageRelationStatistics Valid=400, Invalid=4292, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:19:31,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64351 states. [2021-07-13 20:19:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64351 to 32383. [2021-07-13 20:19:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32383 states, 32382 states have (on average 2.472762645914397) internal successors, (80073), 32382 states have internal predecessors, (80073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32383 states to 32383 states and 80073 transitions. [2021-07-13 20:19:32,602 INFO L78 Accepts]: Start accepts. Automaton has 32383 states and 80073 transitions. Word has length 71 [2021-07-13 20:19:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:32,602 INFO L482 AbstractCegarLoop]: Abstraction has 32383 states and 80073 transitions. [2021-07-13 20:19:32,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 32383 states and 80073 transitions. [2021-07-13 20:19:32,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:19:32,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:32,645 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:32,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:32,845 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1243698253, now seen corresponding path program 138 times [2021-07-13 20:19:32,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:32,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023153973] [2021-07-13 20:19:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023153973] [2021-07-13 20:19:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023153973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492194632] [2021-07-13 20:19:33,178 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:33,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:19:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:19:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:33,344 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 20:19:34,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:19:34,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:34,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:34,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:34,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:170, output treesize:7 [2021-07-13 20:19:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492194632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:34,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 35 [2021-07-13 20:19:34,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485625794] [2021-07-13 20:19:34,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:19:34,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:19:34,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:19:34,496 INFO L87 Difference]: Start difference. First operand 32383 states and 80073 transitions. Second operand has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:39,298 INFO L93 Difference]: Finished difference Result 38879 states and 96017 transitions. [2021-07-13 20:19:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:19:39,299 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:19:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:39,364 INFO L225 Difference]: With dead ends: 38879 [2021-07-13 20:19:39,364 INFO L226 Difference]: Without dead ends: 38783 [2021-07-13 20:19:39,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3471.9ms TimeCoverageRelationStatistics Valid=418, Invalid=4694, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:19:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38783 states. [2021-07-13 20:19:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38783 to 30479. [2021-07-13 20:19:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30479 states, 30478 states have (on average 2.4713891987663232) internal successors, (75323), 30478 states have internal predecessors, (75323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30479 states to 30479 states and 75323 transitions. [2021-07-13 20:19:39,933 INFO L78 Accepts]: Start accepts. Automaton has 30479 states and 75323 transitions. Word has length 71 [2021-07-13 20:19:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:39,934 INFO L482 AbstractCegarLoop]: Abstraction has 30479 states and 75323 transitions. [2021-07-13 20:19:39,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 30479 states and 75323 transitions. [2021-07-13 20:19:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:19:39,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:39,975 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:40,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 20:19:40,176 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1673396813, now seen corresponding path program 139 times [2021-07-13 20:19:40,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:40,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351649273] [2021-07-13 20:19:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:40,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:40,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351649273] [2021-07-13 20:19:40,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351649273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:40,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157448236] [2021-07-13 20:19:40,565 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:19:40,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:41,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:41,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:41,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:19:41,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:41,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:41,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:41,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:19:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:41,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157448236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:41,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:41,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:19:41,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208166183] [2021-07-13 20:19:41,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:41,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:41,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:41,708 INFO L87 Difference]: Start difference. First operand 30479 states and 75323 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:43,953 INFO L93 Difference]: Finished difference Result 54407 states and 135523 transitions. [2021-07-13 20:19:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:43,954 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:19:43,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:44,075 INFO L225 Difference]: With dead ends: 54407 [2021-07-13 20:19:44,075 INFO L226 Difference]: Without dead ends: 54175 [2021-07-13 20:19:44,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1948.4ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:19:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54175 states. [2021-07-13 20:19:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54175 to 30927. [2021-07-13 20:19:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30927 states, 30926 states have (on average 2.4710276143051155) internal successors, (76419), 30926 states have internal predecessors, (76419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30927 states to 30927 states and 76419 transitions. [2021-07-13 20:19:44,843 INFO L78 Accepts]: Start accepts. Automaton has 30927 states and 76419 transitions. Word has length 71 [2021-07-13 20:19:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:44,844 INFO L482 AbstractCegarLoop]: Abstraction has 30927 states and 76419 transitions. [2021-07-13 20:19:44,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 30927 states and 76419 transitions. [2021-07-13 20:19:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:19:44,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:44,891 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:45,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 20:19:45,092 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:45,092 INFO L82 PathProgramCache]: Analyzing trace with hash -70060109, now seen corresponding path program 140 times [2021-07-13 20:19:45,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:45,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946188503] [2021-07-13 20:19:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 202 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:19:45,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:45,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946188503] [2021-07-13 20:19:45,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946188503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:45,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263870600] [2021-07-13 20:19:45,465 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:45,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:45,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:19:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:46,542 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:19:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:46,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:46,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:19:46,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:46,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:46,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:46,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:19:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 3 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:46,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263870600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:46,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:46,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 34 [2021-07-13 20:19:46,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055199914] [2021-07-13 20:19:46,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:19:46,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:46,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:19:46,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:46,631 INFO L87 Difference]: Start difference. First operand 30927 states and 76419 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:48,999 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2021-07-13 20:19:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:50,386 INFO L93 Difference]: Finished difference Result 45659 states and 113299 transitions. [2021-07-13 20:19:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:19:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:19:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:50,468 INFO L225 Difference]: With dead ends: 45659 [2021-07-13 20:19:50,468 INFO L226 Difference]: Without dead ends: 45023 [2021-07-13 20:19:50,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2646.0ms TimeCoverageRelationStatistics Valid=435, Invalid=4677, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:19:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45023 states. [2021-07-13 20:19:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45023 to 27967. [2021-07-13 20:19:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27967 states, 27966 states have (on average 2.473467782307087) internal successors, (69173), 27966 states have internal predecessors, (69173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27967 states to 27967 states and 69173 transitions. [2021-07-13 20:19:51,050 INFO L78 Accepts]: Start accepts. Automaton has 27967 states and 69173 transitions. Word has length 71 [2021-07-13 20:19:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:51,050 INFO L482 AbstractCegarLoop]: Abstraction has 27967 states and 69173 transitions. [2021-07-13 20:19:51,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 27967 states and 69173 transitions. [2021-07-13 20:19:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:19:51,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:51,093 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:51,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 20:19:51,297 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2139698253, now seen corresponding path program 141 times [2021-07-13 20:19:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:51,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928561603] [2021-07-13 20:19:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:51,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:51,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928561603] [2021-07-13 20:19:51,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928561603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:51,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7487104] [2021-07-13 20:19:51,672 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:51,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:19:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:19:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:52,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:19:52,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:52,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:52,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:52,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:19:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7487104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:52,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:52,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-07-13 20:19:52,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879338841] [2021-07-13 20:19:52,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:52,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:52,774 INFO L87 Difference]: Start difference. First operand 27967 states and 69173 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:55,149 INFO L93 Difference]: Finished difference Result 52727 states and 131165 transitions. [2021-07-13 20:19:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:19:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:19:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:55,402 INFO L225 Difference]: With dead ends: 52727 [2021-07-13 20:19:55,403 INFO L226 Difference]: Without dead ends: 52639 [2021-07-13 20:19:55,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1886.3ms TimeCoverageRelationStatistics Valid=379, Invalid=4043, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:19:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52639 states. [2021-07-13 20:19:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52639 to 26831. [2021-07-13 20:19:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26831 states, 26830 states have (on average 2.474133432724562) internal successors, (66381), 26830 states have internal predecessors, (66381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26831 states to 26831 states and 66381 transitions. [2021-07-13 20:19:55,973 INFO L78 Accepts]: Start accepts. Automaton has 26831 states and 66381 transitions. Word has length 71 [2021-07-13 20:19:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:55,974 INFO L482 AbstractCegarLoop]: Abstraction has 26831 states and 66381 transitions. [2021-07-13 20:19:55,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 26831 states and 66381 transitions. [2021-07-13 20:19:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:19:56,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:56,006 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:56,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 20:19:56,206 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1492082765, now seen corresponding path program 142 times [2021-07-13 20:19:56,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:56,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504544414] [2021-07-13 20:19:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:56,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:56,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504544414] [2021-07-13 20:19:56,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504544414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:56,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317488292] [2021-07-13 20:19:56,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:56,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:56,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:56,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:19:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:57,749 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-13 20:19:57,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:57,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:57,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:19:57,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:57,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:57,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:57,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:19:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:57,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317488292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:57,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:57,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:19:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722334004] [2021-07-13 20:19:57,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:57,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:57,926 INFO L87 Difference]: Start difference. First operand 26831 states and 66381 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:00,636 INFO L93 Difference]: Finished difference Result 48487 states and 120645 transitions. [2021-07-13 20:20:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:20:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:00,740 INFO L225 Difference]: With dead ends: 48487 [2021-07-13 20:20:00,741 INFO L226 Difference]: Without dead ends: 48399 [2021-07-13 20:20:00,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2231.0ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:20:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48399 states. [2021-07-13 20:20:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48399 to 26959. [2021-07-13 20:20:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26959 states, 26958 states have (on average 2.4742562504636845) internal successors, (66701), 26958 states have internal predecessors, (66701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26959 states to 26959 states and 66701 transitions. [2021-07-13 20:20:01,352 INFO L78 Accepts]: Start accepts. Automaton has 26959 states and 66701 transitions. Word has length 71 [2021-07-13 20:20:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:01,352 INFO L482 AbstractCegarLoop]: Abstraction has 26959 states and 66701 transitions. [2021-07-13 20:20:01,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 26959 states and 66701 transitions. [2021-07-13 20:20:01,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:01,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:01,385 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:01,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:01,586 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash -693515853, now seen corresponding path program 143 times [2021-07-13 20:20:01,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:01,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062918714] [2021-07-13 20:20:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:01,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062918714] [2021-07-13 20:20:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062918714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343099030] [2021-07-13 20:20:01,984 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:02,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:20:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:20:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:03,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:20:03,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:03,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:03,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:20:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343099030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:03,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:20:03,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132606344] [2021-07-13 20:20:03,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:20:03,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:03,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:20:03,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:03,122 INFO L87 Difference]: Start difference. First operand 26959 states and 66701 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:05,511 INFO L93 Difference]: Finished difference Result 47239 states and 117413 transitions. [2021-07-13 20:20:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:20:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:05,603 INFO L225 Difference]: With dead ends: 47239 [2021-07-13 20:20:05,603 INFO L226 Difference]: Without dead ends: 47199 [2021-07-13 20:20:05,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1963.2ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:20:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47199 states. [2021-07-13 20:20:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47199 to 27167. [2021-07-13 20:20:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27167 states, 27166 states have (on average 2.4744533608186705) internal successors, (67221), 27166 states have internal predecessors, (67221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27167 states to 27167 states and 67221 transitions. [2021-07-13 20:20:06,166 INFO L78 Accepts]: Start accepts. Automaton has 27167 states and 67221 transitions. Word has length 71 [2021-07-13 20:20:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:06,167 INFO L482 AbstractCegarLoop]: Abstraction has 27167 states and 67221 transitions. [2021-07-13 20:20:06,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 27167 states and 67221 transitions. [2021-07-13 20:20:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:06,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:06,282 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:06,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 20:20:06,483 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1586749517, now seen corresponding path program 144 times [2021-07-13 20:20:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:06,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553405136] [2021-07-13 20:20:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:06,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553405136] [2021-07-13 20:20:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553405136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458148821] [2021-07-13 20:20:06,918 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:06,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:20:06,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-13 20:20:06,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:08,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:08,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:20:08,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:08,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:08,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:08,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:20:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:08,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458148821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:08,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:08,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:20:08,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829963211] [2021-07-13 20:20:08,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:20:08,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:08,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:20:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:20:08,022 INFO L87 Difference]: Start difference. First operand 27167 states and 67221 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:10,608 INFO L93 Difference]: Finished difference Result 46591 states and 115911 transitions. [2021-07-13 20:20:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:20:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:10,698 INFO L225 Difference]: With dead ends: 46591 [2021-07-13 20:20:10,698 INFO L226 Difference]: Without dead ends: 46031 [2021-07-13 20:20:10,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2109.3ms TimeCoverageRelationStatistics Valid=412, Invalid=4418, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:20:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46031 states. [2021-07-13 20:20:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46031 to 19935. [2021-07-13 20:20:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19935 states, 19934 states have (on average 2.4840473562757097) internal successors, (49517), 19934 states have internal predecessors, (49517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19935 states to 19935 states and 49517 transitions. [2021-07-13 20:20:11,205 INFO L78 Accepts]: Start accepts. Automaton has 19935 states and 49517 transitions. Word has length 71 [2021-07-13 20:20:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:11,205 INFO L482 AbstractCegarLoop]: Abstraction has 19935 states and 49517 transitions. [2021-07-13 20:20:11,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 19935 states and 49517 transitions. [2021-07-13 20:20:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:11,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:11,229 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:11,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:11,430 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:11,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1405435469, now seen corresponding path program 145 times [2021-07-13 20:20:11,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:11,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853651391] [2021-07-13 20:20:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:11,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:11,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853651391] [2021-07-13 20:20:11,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853651391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:11,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021173348] [2021-07-13 20:20:11,851 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:11,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:20:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:12,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:20:12,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:12,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:12,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:12,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:20:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:12,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021173348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:12,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:12,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:20:12,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157690892] [2021-07-13 20:20:12,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:20:12,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:20:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:20:12,941 INFO L87 Difference]: Start difference. First operand 19935 states and 49517 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:15,182 INFO L93 Difference]: Finished difference Result 39543 states and 98661 transitions. [2021-07-13 20:20:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:20:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:15,250 INFO L225 Difference]: With dead ends: 39543 [2021-07-13 20:20:15,250 INFO L226 Difference]: Without dead ends: 39455 [2021-07-13 20:20:15,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 2039.8ms TimeCoverageRelationStatistics Valid=412, Invalid=4418, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:20:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39455 states. [2021-07-13 20:20:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39455 to 19711. [2021-07-13 20:20:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 2.4838660578386604) internal successors, (48957), 19710 states have internal predecessors, (48957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 48957 transitions. [2021-07-13 20:20:15,781 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 48957 transitions. Word has length 71 [2021-07-13 20:20:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:15,782 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 48957 transitions. [2021-07-13 20:20:15,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 48957 transitions. [2021-07-13 20:20:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:15,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:15,822 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:16,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:16,045 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash -606868557, now seen corresponding path program 146 times [2021-07-13 20:20:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:16,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991102479] [2021-07-13 20:20:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:16,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:16,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991102479] [2021-07-13 20:20:16,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991102479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:16,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494353890] [2021-07-13 20:20:16,470 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:16,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:20:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:17,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:20:17,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:17,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:17,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:17,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:20:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:17,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494353890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:17,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:17,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:20:17,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533763996] [2021-07-13 20:20:17,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:20:17,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:20:17,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:20:17,587 INFO L87 Difference]: Start difference. First operand 19711 states and 48957 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:20,044 INFO L93 Difference]: Finished difference Result 39095 states and 97429 transitions. [2021-07-13 20:20:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:20:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:20,114 INFO L225 Difference]: With dead ends: 39095 [2021-07-13 20:20:20,115 INFO L226 Difference]: Without dead ends: 39055 [2021-07-13 20:20:20,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 2160.4ms TimeCoverageRelationStatistics Valid=412, Invalid=4418, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:20:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39055 states. [2021-07-13 20:20:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39055 to 19647. [2021-07-13 20:20:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19647 states, 19646 states have (on average 2.48381349893108) internal successors, (48797), 19646 states have internal predecessors, (48797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:20,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19647 states to 19647 states and 48797 transitions. [2021-07-13 20:20:20,544 INFO L78 Accepts]: Start accepts. Automaton has 19647 states and 48797 transitions. Word has length 71 [2021-07-13 20:20:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:20,544 INFO L482 AbstractCegarLoop]: Abstraction has 19647 states and 48797 transitions. [2021-07-13 20:20:20,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19647 states and 48797 transitions. [2021-07-13 20:20:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:20,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:20,572 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:20,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:20,772 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1791354445, now seen corresponding path program 147 times [2021-07-13 20:20:20,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:20,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769987907] [2021-07-13 20:20:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:21,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:21,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769987907] [2021-07-13 20:20:21,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769987907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:21,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840758677] [2021-07-13 20:20:21,232 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:21,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:20:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:20:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 60 [2021-07-13 20:20:22,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:22,560 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:20:22,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:22,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-07-13 20:20:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:22,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840758677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:22,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:22,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-07-13 20:20:22,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332249883] [2021-07-13 20:20:22,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:20:22,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:20:22,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:20:22,574 INFO L87 Difference]: Start difference. First operand 19647 states and 48797 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:27,283 INFO L93 Difference]: Finished difference Result 28039 states and 69373 transitions. [2021-07-13 20:20:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:20:27,284 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:27,334 INFO L225 Difference]: With dead ends: 28039 [2021-07-13 20:20:27,334 INFO L226 Difference]: Without dead ends: 27455 [2021-07-13 20:20:27,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 3582.6ms TimeCoverageRelationStatistics Valid=429, Invalid=4683, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:20:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27455 states. [2021-07-13 20:20:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27455 to 20287. [2021-07-13 20:20:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20287 states, 20286 states have (on average 2.4823523612343488) internal successors, (50357), 20286 states have internal predecessors, (50357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20287 states to 20287 states and 50357 transitions. [2021-07-13 20:20:27,706 INFO L78 Accepts]: Start accepts. Automaton has 20287 states and 50357 transitions. Word has length 71 [2021-07-13 20:20:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:27,706 INFO L482 AbstractCegarLoop]: Abstraction has 20287 states and 50357 transitions. [2021-07-13 20:20:27,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20287 states and 50357 transitions. [2021-07-13 20:20:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:27,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:27,731 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:27,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:27,932 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2073914291, now seen corresponding path program 148 times [2021-07-13 20:20:27,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:27,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376365750] [2021-07-13 20:20:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:28,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:28,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376365750] [2021-07-13 20:20:28,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376365750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:28,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317079724] [2021-07-13 20:20:28,474 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:28,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:28,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:28,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:20:28,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:29,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:29,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:29,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:20:29,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:29,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:29,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:29,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:20:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317079724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:29,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:29,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:20:29,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906563603] [2021-07-13 20:20:29,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:20:29,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:20:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:20:29,547 INFO L87 Difference]: Start difference. First operand 20287 states and 50357 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:32,525 INFO L93 Difference]: Finished difference Result 32279 states and 80813 transitions. [2021-07-13 20:20:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:20:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:32,583 INFO L225 Difference]: With dead ends: 32279 [2021-07-13 20:20:32,584 INFO L226 Difference]: Without dead ends: 31999 [2021-07-13 20:20:32,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2160.2ms TimeCoverageRelationStatistics Valid=404, Invalid=4152, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:20:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31999 states. [2021-07-13 20:20:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31999 to 20719. [2021-07-13 20:20:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20719 states, 20718 states have (on average 2.4811757891688386) internal successors, (51405), 20718 states have internal predecessors, (51405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20719 states to 20719 states and 51405 transitions. [2021-07-13 20:20:32,978 INFO L78 Accepts]: Start accepts. Automaton has 20719 states and 51405 transitions. Word has length 71 [2021-07-13 20:20:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:32,978 INFO L482 AbstractCegarLoop]: Abstraction has 20719 states and 51405 transitions. [2021-07-13 20:20:32,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 20719 states and 51405 transitions. [2021-07-13 20:20:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:33,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:33,009 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:33,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:33,210 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1422486093, now seen corresponding path program 149 times [2021-07-13 20:20:33,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:33,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091785327] [2021-07-13 20:20:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:33,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:33,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091785327] [2021-07-13 20:20:33,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091785327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:33,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892770968] [2021-07-13 20:20:33,759 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:33,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:20:33,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:33,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:20:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:35,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:35,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:35,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:20:35,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:35,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:35,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:35,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:170, output treesize:7 [2021-07-13 20:20:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:35,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892770968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:35,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:35,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2021-07-13 20:20:35,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309965773] [2021-07-13 20:20:35,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:20:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:20:35,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:20:35,389 INFO L87 Difference]: Start difference. First operand 20719 states and 51405 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:40,181 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-13 20:20:41,140 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 83 [2021-07-13 20:20:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:41,973 INFO L93 Difference]: Finished difference Result 28243 states and 70241 transitions. [2021-07-13 20:20:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:20:41,974 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:42,024 INFO L225 Difference]: With dead ends: 28243 [2021-07-13 20:20:42,024 INFO L226 Difference]: Without dead ends: 27487 [2021-07-13 20:20:42,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 5184.8ms TimeCoverageRelationStatistics Valid=524, Invalid=6448, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:20:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27487 states. [2021-07-13 20:20:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27487 to 21215. [2021-07-13 20:20:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21215 states, 21214 states have (on average 2.4801074761949655) internal successors, (52613), 21214 states have internal predecessors, (52613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21215 states to 21215 states and 52613 transitions. [2021-07-13 20:20:42,381 INFO L78 Accepts]: Start accepts. Automaton has 21215 states and 52613 transitions. Word has length 71 [2021-07-13 20:20:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:42,381 INFO L482 AbstractCegarLoop]: Abstraction has 21215 states and 52613 transitions. [2021-07-13 20:20:42,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 21215 states and 52613 transitions. [2021-07-13 20:20:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:42,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:42,412 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:42,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 20:20:42,612 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash -979191885, now seen corresponding path program 150 times [2021-07-13 20:20:42,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:42,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942307561] [2021-07-13 20:20:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:43,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:43,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942307561] [2021-07-13 20:20:43,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942307561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:43,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575043833] [2021-07-13 20:20:43,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:43,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:20:43,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:43,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-13 20:20:43,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:44,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:44,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 60 [2021-07-13 20:20:44,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:44,738 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-07-13 20:20:44,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:44,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:176, output treesize:7 [2021-07-13 20:20:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:44,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575043833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:44,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:44,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:20:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144453905] [2021-07-13 20:20:44,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:20:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:44,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:20:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:20:44,752 INFO L87 Difference]: Start difference. First operand 21215 states and 52613 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:49,315 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2021-07-13 20:20:49,939 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2021-07-13 20:20:53,823 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2021-07-13 20:20:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:56,299 INFO L93 Difference]: Finished difference Result 35451 states and 87865 transitions. [2021-07-13 20:20:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-13 20:20:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:20:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:56,443 INFO L225 Difference]: With dead ends: 35451 [2021-07-13 20:20:56,443 INFO L226 Difference]: Without dead ends: 34327 [2021-07-13 20:20:56,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3934 ImplicationChecksByTransitivity, 9150.6ms TimeCoverageRelationStatistics Valid=1047, Invalid=13715, Unknown=0, NotChecked=0, Total=14762 [2021-07-13 20:20:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34327 states. [2021-07-13 20:20:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34327 to 22719. [2021-07-13 20:20:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22719 states, 22718 states have (on average 2.485562109340611) internal successors, (56467), 22718 states have internal predecessors, (56467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22719 states to 22719 states and 56467 transitions. [2021-07-13 20:20:56,806 INFO L78 Accepts]: Start accepts. Automaton has 22719 states and 56467 transitions. Word has length 71 [2021-07-13 20:20:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:56,806 INFO L482 AbstractCegarLoop]: Abstraction has 22719 states and 56467 transitions. [2021-07-13 20:20:56,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 22719 states and 56467 transitions. [2021-07-13 20:20:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:20:56,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:56,831 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:57,032 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1108696499, now seen corresponding path program 151 times [2021-07-13 20:20:57,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192690597] [2021-07-13 20:20:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192690597] [2021-07-13 20:20:57,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192690597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738484429] [2021-07-13 20:20:57,451 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:20:57,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:58,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:58,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:58,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:20:58,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:20:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 13 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:58,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738484429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:58,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:58,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:20:58,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216697284] [2021-07-13 20:20:58,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:20:58,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:20:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:20:58,508 INFO L87 Difference]: Start difference. First operand 22719 states and 56467 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:00,548 INFO L93 Difference]: Finished difference Result 29367 states and 72977 transitions. [2021-07-13 20:21:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:21:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:00,604 INFO L225 Difference]: With dead ends: 29367 [2021-07-13 20:21:00,604 INFO L226 Difference]: Without dead ends: 28895 [2021-07-13 20:21:00,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2220.0ms TimeCoverageRelationStatistics Valid=398, Invalid=4024, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:21:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28895 states. [2021-07-13 20:21:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28895 to 24415. [2021-07-13 20:21:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24415 states, 24414 states have (on average 2.4823052347014007) internal successors, (60603), 24414 states have internal predecessors, (60603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24415 states to 24415 states and 60603 transitions. [2021-07-13 20:21:01,000 INFO L78 Accepts]: Start accepts. Automaton has 24415 states and 60603 transitions. Word has length 71 [2021-07-13 20:21:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:01,000 INFO L482 AbstractCegarLoop]: Abstraction has 24415 states and 60603 transitions. [2021-07-13 20:21:01,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24415 states and 60603 transitions. [2021-07-13 20:21:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:01,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:01,030 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:01,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:21:01,231 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:01,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:01,231 INFO L82 PathProgramCache]: Analyzing trace with hash -399824461, now seen corresponding path program 152 times [2021-07-13 20:21:01,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:01,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027893455] [2021-07-13 20:21:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 198 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 20:21:01,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:01,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027893455] [2021-07-13 20:21:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027893455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:01,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145119094] [2021-07-13 20:21:01,531 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:01,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:01,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:01,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:21:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:02,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:02,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:02,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:02,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:02,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:02,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 7 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:02,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145119094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:02,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:02,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 34 [2021-07-13 20:21:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606678859] [2021-07-13 20:21:02,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:21:02,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:21:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:21:02,526 INFO L87 Difference]: Start difference. First operand 24415 states and 60603 transitions. Second operand has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 34 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:05,243 INFO L93 Difference]: Finished difference Result 32875 states and 81701 transitions. [2021-07-13 20:21:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:21:05,243 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 34 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:05,298 INFO L225 Difference]: With dead ends: 32875 [2021-07-13 20:21:05,299 INFO L226 Difference]: Without dead ends: 32319 [2021-07-13 20:21:05,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2399.5ms TimeCoverageRelationStatistics Valid=412, Invalid=4010, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:21:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32319 states. [2021-07-13 20:21:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32319 to 23535. [2021-07-13 20:21:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23535 states, 23534 states have (on average 2.483683181779553) internal successors, (58451), 23534 states have internal predecessors, (58451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23535 states to 23535 states and 58451 transitions. [2021-07-13 20:21:05,710 INFO L78 Accepts]: Start accepts. Automaton has 23535 states and 58451 transitions. Word has length 71 [2021-07-13 20:21:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:05,710 INFO L482 AbstractCegarLoop]: Abstraction has 23535 states and 58451 transitions. [2021-07-13 20:21:05,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 34 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 23535 states and 58451 transitions. [2021-07-13 20:21:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:05,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:05,736 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:05,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:21:05,937 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:05,937 INFO L82 PathProgramCache]: Analyzing trace with hash 477438387, now seen corresponding path program 153 times [2021-07-13 20:21:05,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:05,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163940332] [2021-07-13 20:21:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:06,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163940332] [2021-07-13 20:21:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163940332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545021083] [2021-07-13 20:21:06,301 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:06,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:21:06,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:06,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:21:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:07,146 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-13 20:21:07,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:07,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:07,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:07,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:07,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:07,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:07,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:07,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545021083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:07,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:07,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-07-13 20:21:07,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044062593] [2021-07-13 20:21:07,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:21:07,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:21:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:21:07,473 INFO L87 Difference]: Start difference. First operand 23535 states and 58451 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:10,395 INFO L93 Difference]: Finished difference Result 28871 states and 71683 transitions. [2021-07-13 20:21:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:21:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:10,448 INFO L225 Difference]: With dead ends: 28871 [2021-07-13 20:21:10,448 INFO L226 Difference]: Without dead ends: 28383 [2021-07-13 20:21:10,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 2294.8ms TimeCoverageRelationStatistics Valid=366, Invalid=3794, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:21:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28383 states. [2021-07-13 20:21:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28383 to 23087. [2021-07-13 20:21:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23087 states, 23086 states have (on average 2.4831066447197436) internal successors, (57325), 23086 states have internal predecessors, (57325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23087 states to 23087 states and 57325 transitions. [2021-07-13 20:21:10,853 INFO L78 Accepts]: Start accepts. Automaton has 23087 states and 57325 transitions. Word has length 71 [2021-07-13 20:21:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:10,854 INFO L482 AbstractCegarLoop]: Abstraction has 23087 states and 57325 transitions. [2021-07-13 20:21:10,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 23087 states and 57325 transitions. [2021-07-13 20:21:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:10,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:10,996 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:11,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 20:21:11,196 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2035475891, now seen corresponding path program 154 times [2021-07-13 20:21:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:11,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313411864] [2021-07-13 20:21:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:11,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:11,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313411864] [2021-07-13 20:21:11,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313411864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:11,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267075062] [2021-07-13 20:21:11,569 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:11,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:11,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:11,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:21:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:12,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:12,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:12,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:12,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:12,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:12,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 13 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267075062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:12,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:12,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-07-13 20:21:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994317564] [2021-07-13 20:21:12,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:21:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:21:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:21:12,601 INFO L87 Difference]: Start difference. First operand 23087 states and 57325 transitions. Second operand has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:14,752 INFO L93 Difference]: Finished difference Result 31975 states and 79499 transitions. [2021-07-13 20:21:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:21:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:14,810 INFO L225 Difference]: With dead ends: 31975 [2021-07-13 20:21:14,810 INFO L226 Difference]: Without dead ends: 31535 [2021-07-13 20:21:14,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1920.5ms TimeCoverageRelationStatistics Valid=330, Invalid=3452, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:21:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31535 states. [2021-07-13 20:21:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31535 to 25455. [2021-07-13 20:21:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25455 states, 25454 states have (on average 2.4821639035122183) internal successors, (63181), 25454 states have internal predecessors, (63181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25455 states to 25455 states and 63181 transitions. [2021-07-13 20:21:15,312 INFO L78 Accepts]: Start accepts. Automaton has 25455 states and 63181 transitions. Word has length 71 [2021-07-13 20:21:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:15,312 INFO L482 AbstractCegarLoop]: Abstraction has 25455 states and 63181 transitions. [2021-07-13 20:21:15,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 25455 states and 63181 transitions. [2021-07-13 20:21:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:15,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:15,339 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:15,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:15,540 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1126450765, now seen corresponding path program 155 times [2021-07-13 20:21:15,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:15,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63636143] [2021-07-13 20:21:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:15,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:15,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63636143] [2021-07-13 20:21:15,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63636143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:15,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609265298] [2021-07-13 20:21:15,917 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:15,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:21:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:21:15,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:16,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:16,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:16,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:16,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:16,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:16,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:16,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609265298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:16,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:16,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-07-13 20:21:16,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440489166] [2021-07-13 20:21:16,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:21:16,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:21:16,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:21:16,968 INFO L87 Difference]: Start difference. First operand 25455 states and 63181 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:18,732 INFO L93 Difference]: Finished difference Result 40631 states and 101189 transitions. [2021-07-13 20:21:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:21:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:18,810 INFO L225 Difference]: With dead ends: 40631 [2021-07-13 20:21:18,810 INFO L226 Difference]: Without dead ends: 40543 [2021-07-13 20:21:18,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1848.9ms TimeCoverageRelationStatistics Valid=341, Invalid=3565, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:21:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40543 states. [2021-07-13 20:21:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40543 to 24623. [2021-07-13 20:21:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24623 states, 24622 states have (on average 2.4815612054260416) internal successors, (61101), 24622 states have internal predecessors, (61101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24623 states to 24623 states and 61101 transitions. [2021-07-13 20:21:19,376 INFO L78 Accepts]: Start accepts. Automaton has 24623 states and 61101 transitions. Word has length 71 [2021-07-13 20:21:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:19,376 INFO L482 AbstractCegarLoop]: Abstraction has 24623 states and 61101 transitions. [2021-07-13 20:21:19,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 24623 states and 61101 transitions. [2021-07-13 20:21:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:19,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:19,405 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:19,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-13 20:21:19,606 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1890623053, now seen corresponding path program 156 times [2021-07-13 20:21:19,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:19,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763719749] [2021-07-13 20:21:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:20,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:20,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763719749] [2021-07-13 20:21:20,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763719749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:20,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362497014] [2021-07-13 20:21:20,037 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:20,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:21:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-13 20:21:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:21,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:21,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:21,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 60 [2021-07-13 20:21:21,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:21,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:21,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:21,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-07-13 20:21:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:21,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362497014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:21,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:21,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:21:21,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264284538] [2021-07-13 20:21:21,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:21:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:21,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:21:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:21:21,118 INFO L87 Difference]: Start difference. First operand 24623 states and 61101 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:23,021 INFO L93 Difference]: Finished difference Result 35815 states and 89413 transitions. [2021-07-13 20:21:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:21:23,021 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:23,078 INFO L225 Difference]: With dead ends: 35815 [2021-07-13 20:21:23,078 INFO L226 Difference]: Without dead ends: 35631 [2021-07-13 20:21:23,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1949.2ms TimeCoverageRelationStatistics Valid=374, Invalid=3658, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:21:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35631 states. [2021-07-13 20:21:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35631 to 24735. [2021-07-13 20:21:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 2.4816446996037844) internal successors, (61381), 24734 states have internal predecessors, (61381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 61381 transitions. [2021-07-13 20:21:23,492 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 61381 transitions. Word has length 71 [2021-07-13 20:21:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:23,492 INFO L482 AbstractCegarLoop]: Abstraction has 24735 states and 61381 transitions. [2021-07-13 20:21:23,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 61381 transitions. [2021-07-13 20:21:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:23,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:23,520 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:23,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:23,721 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash 184616883, now seen corresponding path program 157 times [2021-07-13 20:21:23,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:23,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047986422] [2021-07-13 20:21:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:24,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047986422] [2021-07-13 20:21:24,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047986422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341062667] [2021-07-13 20:21:24,115 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:21:24,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:25,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:25,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:25,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:25,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:25,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 13 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:25,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341062667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:25,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:25,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-07-13 20:21:25,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246619459] [2021-07-13 20:21:25,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:21:25,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:21:25,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:21:25,146 INFO L87 Difference]: Start difference. First operand 24735 states and 61381 transitions. Second operand has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:26,484 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-13 20:21:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:27,311 INFO L93 Difference]: Finished difference Result 31671 states and 78691 transitions. [2021-07-13 20:21:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:21:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:27,366 INFO L225 Difference]: With dead ends: 31671 [2021-07-13 20:21:27,367 INFO L226 Difference]: Without dead ends: 31263 [2021-07-13 20:21:27,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1977.4ms TimeCoverageRelationStatistics Valid=311, Invalid=3229, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:21:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31263 states. [2021-07-13 20:21:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31263 to 25903. [2021-07-13 20:21:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25903 states, 25902 states have (on average 2.4809281136591768) internal successors, (64261), 25902 states have internal predecessors, (64261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25903 states to 25903 states and 64261 transitions. [2021-07-13 20:21:27,799 INFO L78 Accepts]: Start accepts. Automaton has 25903 states and 64261 transitions. Word has length 71 [2021-07-13 20:21:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:27,799 INFO L482 AbstractCegarLoop]: Abstraction has 25903 states and 64261 transitions. [2021-07-13 20:21:27,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25903 states and 64261 transitions. [2021-07-13 20:21:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:27,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:27,831 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:28,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:28,032 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1317657523, now seen corresponding path program 158 times [2021-07-13 20:21:28,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:28,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043759115] [2021-07-13 20:21:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:28,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:28,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043759115] [2021-07-13 20:21:28,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043759115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:28,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615999636] [2021-07-13 20:21:28,419 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:28,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:21:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:29,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:29,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:29,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:29,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:29,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:29,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615999636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:29,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:29,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-07-13 20:21:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813630940] [2021-07-13 20:21:29,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:21:29,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:21:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:21:29,474 INFO L87 Difference]: Start difference. First operand 25903 states and 64261 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:30,807 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-13 20:21:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:31,262 INFO L93 Difference]: Finished difference Result 40887 states and 101845 transitions. [2021-07-13 20:21:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:21:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:31,335 INFO L225 Difference]: With dead ends: 40887 [2021-07-13 20:21:31,335 INFO L226 Difference]: Without dead ends: 40799 [2021-07-13 20:21:31,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1875.1ms TimeCoverageRelationStatistics Valid=323, Invalid=3337, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:21:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40799 states. [2021-07-13 20:21:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40799 to 25631. [2021-07-13 20:21:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25631 states, 25630 states have (on average 2.4807257120561843) internal successors, (63581), 25630 states have internal predecessors, (63581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25631 states to 25631 states and 63581 transitions. [2021-07-13 20:21:31,832 INFO L78 Accepts]: Start accepts. Automaton has 25631 states and 63581 transitions. Word has length 71 [2021-07-13 20:21:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:31,832 INFO L482 AbstractCegarLoop]: Abstraction has 25631 states and 63581 transitions. [2021-07-13 20:21:31,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 25631 states and 63581 transitions. [2021-07-13 20:21:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:31,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:31,865 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:32,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:32,066 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash 965259187, now seen corresponding path program 159 times [2021-07-13 20:21:32,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:32,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462219473] [2021-07-13 20:21:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:32,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:32,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462219473] [2021-07-13 20:21:32,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462219473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:32,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837772892] [2021-07-13 20:21:32,464 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:32,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:21:32,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:21:32,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:33,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:33,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:33,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:33,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:33,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:33,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:33,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:33,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837772892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:33,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:33,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-07-13 20:21:33,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982219304] [2021-07-13 20:21:33,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:21:33,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:21:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:21:33,514 INFO L87 Difference]: Start difference. First operand 25631 states and 63581 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:35,469 INFO L93 Difference]: Finished difference Result 39015 states and 97173 transitions. [2021-07-13 20:21:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:21:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:35,541 INFO L225 Difference]: With dead ends: 39015 [2021-07-13 20:21:35,541 INFO L226 Difference]: Without dead ends: 38927 [2021-07-13 20:21:35,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1815.3ms TimeCoverageRelationStatistics Valid=362, Invalid=3544, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:21:35,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38927 states. [2021-07-13 20:21:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38927 to 25807. [2021-07-13 20:21:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25807 states, 25806 states have (on average 2.4808571650003874) internal successors, (64021), 25806 states have internal predecessors, (64021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25807 states to 25807 states and 64021 transitions. [2021-07-13 20:21:36,108 INFO L78 Accepts]: Start accepts. Automaton has 25807 states and 64021 transitions. Word has length 71 [2021-07-13 20:21:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:36,108 INFO L482 AbstractCegarLoop]: Abstraction has 25807 states and 64021 transitions. [2021-07-13 20:21:36,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25807 states and 64021 transitions. [2021-07-13 20:21:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:36,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:36,140 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:36,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:36,341 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash 553485235, now seen corresponding path program 160 times [2021-07-13 20:21:36,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:36,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130207875] [2021-07-13 20:21:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:36,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:36,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130207875] [2021-07-13 20:21:36,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130207875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:36,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346530367] [2021-07-13 20:21:36,782 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:36,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:36,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:36,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:21:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:37,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:37,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:37,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:37,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:37,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346530367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:37,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:37,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:21:37,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334289350] [2021-07-13 20:21:37,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:21:37,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:21:37,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:21:37,868 INFO L87 Difference]: Start difference. First operand 25807 states and 64021 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:39,948 INFO L93 Difference]: Finished difference Result 37287 states and 92853 transitions. [2021-07-13 20:21:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:21:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:40,012 INFO L225 Difference]: With dead ends: 37287 [2021-07-13 20:21:40,012 INFO L226 Difference]: Without dead ends: 37199 [2021-07-13 20:21:40,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1887.5ms TimeCoverageRelationStatistics Valid=378, Invalid=3654, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:21:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37199 states. [2021-07-13 20:21:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37199 to 25807. [2021-07-13 20:21:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25807 states, 25806 states have (on average 2.4808571650003874) internal successors, (64021), 25806 states have internal predecessors, (64021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25807 states to 25807 states and 64021 transitions. [2021-07-13 20:21:40,453 INFO L78 Accepts]: Start accepts. Automaton has 25807 states and 64021 transitions. Word has length 71 [2021-07-13 20:21:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:40,454 INFO L482 AbstractCegarLoop]: Abstraction has 25807 states and 64021 transitions. [2021-07-13 20:21:40,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 25807 states and 64021 transitions. [2021-07-13 20:21:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:40,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:40,482 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:40,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 20:21:40,682 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash -822858317, now seen corresponding path program 161 times [2021-07-13 20:21:40,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:40,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336216383] [2021-07-13 20:21:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:41,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:41,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336216383] [2021-07-13 20:21:41,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336216383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:41,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349772090] [2021-07-13 20:21:41,116 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:41,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:21:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:21:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:42,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:42,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:42,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-13 20:21:42,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:42,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:42,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:42,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-13 20:21:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:42,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349772090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:42,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:42,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-07-13 20:21:42,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069379334] [2021-07-13 20:21:42,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:21:42,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:42,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:21:42,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:21:42,215 INFO L87 Difference]: Start difference. First operand 25807 states and 64021 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:44,182 INFO L93 Difference]: Finished difference Result 34503 states and 85789 transitions. [2021-07-13 20:21:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:21:44,183 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-07-13 20:21:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:44,245 INFO L225 Difference]: With dead ends: 34503 [2021-07-13 20:21:44,245 INFO L226 Difference]: Without dead ends: 34463 [2021-07-13 20:21:44,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1835.3ms TimeCoverageRelationStatistics Valid=368, Invalid=3538, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:21:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34463 states. [2021-07-13 20:21:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34463 to 25823. [2021-07-13 20:21:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25823 states, 25822 states have (on average 2.480869026411587) internal successors, (64061), 25822 states have internal predecessors, (64061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25823 states to 25823 states and 64061 transitions. [2021-07-13 20:21:44,726 INFO L78 Accepts]: Start accepts. Automaton has 25823 states and 64061 transitions. Word has length 71 [2021-07-13 20:21:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:44,726 INFO L482 AbstractCegarLoop]: Abstraction has 25823 states and 64061 transitions. [2021-07-13 20:21:44,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 25823 states and 64061 transitions. [2021-07-13 20:21:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:21:44,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:44,755 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:44,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 20:21:44,955 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash -200995405, now seen corresponding path program 162 times [2021-07-13 20:21:44,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:44,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742058067] [2021-07-13 20:21:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:45,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742058067] [2021-07-13 20:21:45,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742058067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241222091] [2021-07-13 20:21:45,402 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:45,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:21:45,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:45,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:21:45,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:47,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:21:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:21:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 60 [2021-07-13 20:21:47,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:47,605 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-13 20:21:47,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:47,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:178, output treesize:7 [2021-07-13 20:21:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:47,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241222091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:47,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:47,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2021-07-13 20:21:47,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931019262] [2021-07-13 20:21:47,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:21:47,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:47,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:21:47,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:21:47,618 INFO L87 Difference]: Start difference. First operand 25823 states and 64061 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:21:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:21:50,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:50,565 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:21:50,566 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:21:50,567 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:21:50,568 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:21:50 BasicIcfg [2021-07-13 20:21:50,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:21:50,568 INFO L168 Benchmark]: Toolchain (without parser) took 805034.73 ms. Allocated memory was 186.6 MB in the beginning and 4.1 GB in the end (delta: 3.9 GB). Free memory was 166.1 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. [2021-07-13 20:21:50,568 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 186.6 MB. Free memory is still 167.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:21:50,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.18 ms. Allocated memory is still 186.6 MB. Free memory was 166.0 MB in the beginning and 164.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:50,568 INFO L168 Benchmark]: Boogie Preprocessor took 13.54 ms. Allocated memory is still 186.6 MB. Free memory was 164.6 MB in the beginning and 163.7 MB in the end (delta: 947.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:50,568 INFO L168 Benchmark]: RCFGBuilder took 328.82 ms. Allocated memory is still 186.6 MB. Free memory was 163.5 MB in the beginning and 150.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:50,568 INFO L168 Benchmark]: TraceAbstraction took 804662.27 ms. Allocated memory was 186.6 MB in the beginning and 4.1 GB in the end (delta: 3.9 GB). Free memory was 150.2 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. [2021-07-13 20:21:50,569 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 186.6 MB. Free memory is still 167.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.18 ms. Allocated memory is still 186.6 MB. Free memory was 166.0 MB in the beginning and 164.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.54 ms. Allocated memory is still 186.6 MB. Free memory was 164.6 MB in the beginning and 163.7 MB in the end (delta: 947.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.82 ms. Allocated memory is still 186.6 MB. Free memory was 163.5 MB in the beginning and 150.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 804662.27 ms. Allocated memory was 186.6 MB in the beginning and 4.1 GB in the end (delta: 3.9 GB). Free memory was 150.2 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (25823states) and FLOYD_HOARE automaton (currently 22 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 56 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 804565.0ms, OverallIterations: 169, TraceHistogramMax: 9, EmptinessCheckTime: 3128.9ms, AutomataDifference: 540345.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 71.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14021 SDtfs, 37475 SDslu, 189818 SDs, 0 SdLazy, 207009 SolverSat, 9272 SolverUnsat, 50 SolverUnknown, 0 SolverNotchecked, 308339.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16037 GetRequests, 7622 SyntacticMatches, 523 SemanticMatches, 7891 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110387 ImplicationChecksByTransitivity, 319748.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34367occurred in iteration=143, InterpolantAutomatonStates: 4552, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43746.3ms AutomataMinimizationTime, 168 MinimizatonAttempts, 1092296 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 793.2ms SsaConstructionTime, 3645.5ms SatisfiabilityAnalysisTime, 175304.0ms InterpolantComputationTime, 19310 NumberOfCodeBlocks, 19310 NumberOfCodeBlocksAsserted, 897 NumberOfCheckSat, 18976 ConstructedInterpolants, 1316 QuantifiedInterpolants, 671192 SizeOfPredicates, 347 NumberOfNonLiveVariables, 21201 ConjunctsInSsa, 9179 ConjunctsInUnsatCore, 334 InterpolantComputations, 5 PerfectInterpolantSequences, 2866/43979 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown