/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:42:56,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:42:56,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:42:56,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:42:56,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:42:56,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:42:56,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:42:56,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:42:56,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:42:56,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:42:56,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:42:56,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:42:56,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:42:56,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:42:56,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:42:56,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:42:56,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-09 18:42:56,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:42:56,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:42:56,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:42:56,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:42:56,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:42:56,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:42:56,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:42:56,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:42:56,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:42:56,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:42:56,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:42:56,360 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:42:56,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:42:56,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:42:56,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:42:56,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:42:56,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:42:56,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:42:56,404 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:42:56,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:42:56,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:42:56,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:42:56,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:42:56,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:42:56,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:42:56,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:42:56,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:42:56,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:42:56,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:42:56,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:42:56,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:42:56,674 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:42:56,675 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:42:56,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl [2021-07-09 18:42:56,676 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl' [2021-07-09 18:42:56,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:42:56,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:42:56,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:42:56,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:42:56,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:42:56,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:42:56,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:42:56,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:42:56,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:42:56,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... [2021-07-09 18:42:56,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:42:56,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:42:56,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:42:56,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:42:56,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:42:56,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:42:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:42:56,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:42:56,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:42:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:42:56,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:42:56,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:42:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:42:56,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:42:56,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:42:56,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:42:56,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:42:56,793 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:42:56,946 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:42:56,946 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:42:56,948 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:42:56 BoogieIcfgContainer [2021-07-09 18:42:56,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:42:56,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:42:56,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:42:56,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:42:56,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:42:56" (1/2) ... [2021-07-09 18:42:56,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fba2302 and model type sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:42:56, skipping insertion in model container [2021-07-09 18:42:56,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:42:56" (2/2) ... [2021-07-09 18:42:56,952 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun-alt.wvr.bpl [2021-07-09 18:42:56,956 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:42:56,956 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:42:56,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:42:56,956 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:42:56,980 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:42:56,994 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:42:57,006 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:42:57,006 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:42:57,006 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:42:57,006 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:42:57,007 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:42:57,007 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:42:57,007 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:42:57,007 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:42:57,013 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-09 18:42:57,033 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:42:57,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:57,042 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:57,042 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:57,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:57,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-07-09 18:42:57,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:57,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458481711] [2021-07-09 18:42:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:57,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:57,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458481711] [2021-07-09 18:42:57,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458481711] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:42:57,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:42:57,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:42:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034494069] [2021-07-09 18:42:57,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:42:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:42:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:42:57,217 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:57,254 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-09 18:42:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:42:57,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:42:57,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:57,263 INFO L225 Difference]: With dead ends: 217 [2021-07-09 18:42:57,264 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 18:42:57,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:42:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 18:42:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-09 18:42:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-09 18:42:57,312 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-09 18:42:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:57,312 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-09 18:42:57,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-09 18:42:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:42:57,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:57,314 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] [2021-07-09 18:42:57,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:42:57,315 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:57,315 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-07-09 18:42:57,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:57,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415229406] [2021-07-09 18:42:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:57,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415229406] [2021-07-09 18:42:57,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415229406] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:42:57,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:42:57,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:42:57,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137084226] [2021-07-09 18:42:57,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:42:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:42:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:42:57,377 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:57,427 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-09 18:42:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:42:57,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:42:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:57,431 INFO L225 Difference]: With dead ends: 158 [2021-07-09 18:42:57,431 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:42:57,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:42:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:42:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-09 18:42:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-09 18:42:57,446 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-09 18:42:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:57,446 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-09 18:42:57,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-09 18:42:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:42:57,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:57,447 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] [2021-07-09 18:42:57,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:42:57,447 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-07-09 18:42:57,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:57,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480102649] [2021-07-09 18:42:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:57,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:57,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480102649] [2021-07-09 18:42:57,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480102649] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:42:57,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:42:57,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:42:57,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399936863] [2021-07-09 18:42:57,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:42:57,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:42:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:42:57,506 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:57,548 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-09 18:42:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:42:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:42:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:57,551 INFO L225 Difference]: With dead ends: 183 [2021-07-09 18:42:57,553 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 18:42:57,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:42:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 18:42:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-09 18:42:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-09 18:42:57,572 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-09 18:42:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:57,573 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-09 18:42:57,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-09 18:42:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:42:57,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:57,574 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] [2021-07-09 18:42:57,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:42:57,574 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-07-09 18:42:57,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:57,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023090892] [2021-07-09 18:42:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:57,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:57,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023090892] [2021-07-09 18:42:57,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023090892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:57,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689900081] [2021-07-09 18:42:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:57,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:42:57,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:58,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:42:58,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:42:58,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:58,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:58,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:58,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-07-09 18:42:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:58,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689900081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:58,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:58,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:42:58,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299915096] [2021-07-09 18:42:58,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:58,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:58,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:58,122 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-07-09 18:42:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:58,268 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-09 18:42:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:42:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 22 [2021-07-09 18:42:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:58,269 INFO L225 Difference]: With dead ends: 330 [2021-07-09 18:42:58,270 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 18:42:58,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:42:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 18:42:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-09 18:42:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-09 18:42:58,277 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-09 18:42:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:58,277 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-09 18:42:58,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-07-09 18:42:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-09 18:42:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:42:58,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:58,278 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] [2021-07-09 18:42:58,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:58,493 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-07-09 18:42:58,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:58,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871961782] [2021-07-09 18:42:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:58,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:58,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871961782] [2021-07-09 18:42:58,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871961782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:58,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063112977] [2021-07-09 18:42:58,642 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 [2021-07-09 18:42:58,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:58,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:42:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:58,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:58,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:42:58,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:42:58,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:58,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:58,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:42:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:58,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063112977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:58,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:58,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 18:42:58,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083513818] [2021-07-09 18:42:58,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:42:58,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:42:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:42:58,847 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:59,136 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-09 18:42:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:42:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:42:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:59,138 INFO L225 Difference]: With dead ends: 374 [2021-07-09 18:42:59,138 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 18:42:59,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 18:42:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-09 18:42:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-09 18:42:59,145 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-09 18:42:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:59,145 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-09 18:42:59,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-09 18:42:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:42:59,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:59,146 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] [2021-07-09 18:42:59,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:59,363 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:59,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-07-09 18:42:59,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:59,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981049431] [2021-07-09 18:42:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:59,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:59,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981049431] [2021-07-09 18:42:59,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981049431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:59,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453252665] [2021-07-09 18:42:59,494 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 [2021-07-09 18:42:59,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:42:59,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:42:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:59,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:42:59,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:59,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:59,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:59,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:42:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:59,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453252665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:59,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:59,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:42:59,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448324028] [2021-07-09 18:42:59,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:59,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:59,654 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:59,784 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-07-09 18:42:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:42:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:42:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:59,786 INFO L225 Difference]: With dead ends: 363 [2021-07-09 18:42:59,786 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 18:42:59,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 18:42:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-07-09 18:42:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-09 18:42:59,793 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-09 18:42:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:59,793 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-09 18:42:59,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-09 18:42:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:42:59,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:59,794 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] [2021-07-09 18:43:00,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:00,009 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-07-09 18:43:00,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:00,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390526913] [2021-07-09 18:43:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:00,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390526913] [2021-07-09 18:43:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390526913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068329481] [2021-07-09 18:43:00,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:00,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:00,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:43:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:00,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:43:00,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:43:00,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:00,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:00,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:19 [2021-07-09 18:43:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:00,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068329481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:00,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:00,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:43:00,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268105082] [2021-07-09 18:43:00,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:43:00,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:00,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:43:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:00,302 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:00,482 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-07-09 18:43:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:43:00,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:43:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:00,484 INFO L225 Difference]: With dead ends: 425 [2021-07-09 18:43:00,484 INFO L226 Difference]: Without dead ends: 410 [2021-07-09 18:43:00,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-09 18:43:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-07-09 18:43:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-09 18:43:00,490 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-09 18:43:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:00,491 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-09 18:43:00,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-09 18:43:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:00,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:00,492 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] [2021-07-09 18:43:00,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:00,697 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-07-09 18:43:00,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:00,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235209562] [2021-07-09 18:43:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:00,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:00,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235209562] [2021-07-09 18:43:00,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235209562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:00,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386816866] [2021-07-09 18:43:00,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:00,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:00,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:00,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386816866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:00,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:00,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:43:00,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691306483] [2021-07-09 18:43:00,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:43:00,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:00,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:43:00,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:00,885 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:01,218 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-09 18:43:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:43:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:01,222 INFO L225 Difference]: With dead ends: 619 [2021-07-09 18:43:01,222 INFO L226 Difference]: Without dead ends: 619 [2021-07-09 18:43:01,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:43:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-09 18:43:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-09 18:43:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-09 18:43:01,230 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-09 18:43:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:01,231 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-09 18:43:01,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-09 18:43:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:01,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:01,233 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] [2021-07-09 18:43:01,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 18:43:01,450 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-07-09 18:43:01,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:01,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465457244] [2021-07-09 18:43:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:01,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:01,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465457244] [2021-07-09 18:43:01,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465457244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:01,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391352572] [2021-07-09 18:43:01,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:01,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:43:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:01,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391352572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:01,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:01,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466487447] [2021-07-09 18:43:01,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:01,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:01,625 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:02,228 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-09 18:43:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:43:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:02,233 INFO L225 Difference]: With dead ends: 1078 [2021-07-09 18:43:02,233 INFO L226 Difference]: Without dead ends: 1078 [2021-07-09 18:43:02,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:43:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-09 18:43:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-09 18:43:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-09 18:43:02,260 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-09 18:43:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:02,260 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-09 18:43:02,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-09 18:43:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:02,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:02,261 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] [2021-07-09 18:43:02,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:02,480 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-07-09 18:43:02,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:02,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960033296] [2021-07-09 18:43:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:02,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:02,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960033296] [2021-07-09 18:43:02,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960033296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:02,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305386260] [2021-07-09 18:43:02,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:02,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305386260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:02,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:02,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:02,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735667952] [2021-07-09 18:43:02,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:02,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:02,628 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:03,174 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-09 18:43:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:43:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:03,178 INFO L225 Difference]: With dead ends: 951 [2021-07-09 18:43:03,178 INFO L226 Difference]: Without dead ends: 951 [2021-07-09 18:43:03,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:43:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-09 18:43:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-09 18:43:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-09 18:43:03,188 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-09 18:43:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:03,188 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-09 18:43:03,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-09 18:43:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:03,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:03,189 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:03,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:43:03,405 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:03,406 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-07-09 18:43:03,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:03,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231506273] [2021-07-09 18:43:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:03,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:03,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231506273] [2021-07-09 18:43:03,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231506273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:03,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936016184] [2021-07-09 18:43:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:43:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:03,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936016184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:03,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:03,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:43:03,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664114632] [2021-07-09 18:43:03,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:43:03,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:03,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:43:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:43:03,595 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:03,741 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-09 18:43:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:43:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:03,744 INFO L225 Difference]: With dead ends: 669 [2021-07-09 18:43:03,744 INFO L226 Difference]: Without dead ends: 663 [2021-07-09 18:43:03,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-09 18:43:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-09 18:43:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-09 18:43:03,770 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-09 18:43:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:03,771 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-09 18:43:03,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-09 18:43:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:03,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:03,772 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] [2021-07-09 18:43:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:43:03,989 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-07-09 18:43:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:03,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991194477] [2021-07-09 18:43:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:04,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:04,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991194477] [2021-07-09 18:43:04,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991194477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:04,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791348710] [2021-07-09 18:43:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:04,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791348710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:04,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:04,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:43:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566000997] [2021-07-09 18:43:04,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:04,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:04,151 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:04,304 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-09 18:43:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:43:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:04,307 INFO L225 Difference]: With dead ends: 710 [2021-07-09 18:43:04,307 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 18:43:04,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:43:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 18:43:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-09 18:43:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-09 18:43:04,319 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-09 18:43:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:04,320 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-09 18:43:04,320 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) [2021-07-09 18:43:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-09 18:43:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:04,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:04,321 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:04,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:43:04,538 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-07-09 18:43:04,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:04,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860042808] [2021-07-09 18:43:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:04,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:04,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860042808] [2021-07-09 18:43:04,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860042808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:04,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409634894] [2021-07-09 18:43:04,569 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:43:04,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:43:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:04,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409634894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:04,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:04,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:43:04,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516042287] [2021-07-09 18:43:04,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:43:04,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:43:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:43:04,647 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:04,741 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-09 18:43:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:43:04,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:04,744 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:43:04,744 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 18:43:04,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 18:43:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-09 18:43:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-09 18:43:04,757 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-09 18:43:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:04,758 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-09 18:43:04,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-09 18:43:04,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:04,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:04,759 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] [2021-07-09 18:43:04,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:43:04,972 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-07-09 18:43:04,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:04,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633856329] [2021-07-09 18:43:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:05,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:05,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633856329] [2021-07-09 18:43:05,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633856329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:05,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009142345] [2021-07-09 18:43:05,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:05,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:05,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:05,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009142345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:05,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:05,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:43:05,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537764068] [2021-07-09 18:43:05,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:43:05,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:05,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:43:05,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:43:05,167 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:05,429 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-09 18:43:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:43:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:05,435 INFO L225 Difference]: With dead ends: 1196 [2021-07-09 18:43:05,435 INFO L226 Difference]: Without dead ends: 1196 [2021-07-09 18:43:05,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:43:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-09 18:43:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-09 18:43:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-09 18:43:05,450 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-09 18:43:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:05,450 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-09 18:43:05,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-09 18:43:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:05,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:05,452 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] [2021-07-09 18:43:05,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:43:05,665 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-07-09 18:43:05,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:05,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639976842] [2021-07-09 18:43:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:05,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:05,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639976842] [2021-07-09 18:43:05,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639976842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:05,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501489788] [2021-07-09 18:43:05,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:05,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:05,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501489788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:05,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:05,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:43:05,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411508345] [2021-07-09 18:43:05,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:43:05,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:43:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:43:05,826 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:06,230 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-09 18:43:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:43:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:06,235 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 18:43:06,235 INFO L226 Difference]: Without dead ends: 1492 [2021-07-09 18:43:06,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:43:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-09 18:43:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-09 18:43:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-09 18:43:06,253 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-09 18:43:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:06,253 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-09 18:43:06,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-09 18:43:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:06,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:06,254 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] [2021-07-09 18:43:06,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:06,471 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-07-09 18:43:06,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:06,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387474667] [2021-07-09 18:43:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:06,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:06,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387474667] [2021-07-09 18:43:06,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387474667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:06,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709694639] [2021-07-09 18:43:06,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:06,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:06,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709694639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:06,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:06,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:43:06,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292685019] [2021-07-09 18:43:06,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:06,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:06,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:06,634 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:06,857 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-09 18:43:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:43:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:06,862 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 18:43:06,862 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 18:43:06,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:43:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 18:43:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-09 18:43:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-09 18:43:06,882 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-09 18:43:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:06,882 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-09 18:43:06,882 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) [2021-07-09 18:43:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-09 18:43:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:06,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:06,885 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] [2021-07-09 18:43:07,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-07-09 18:43:07,101 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-07-09 18:43:07,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:07,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699663190] [2021-07-09 18:43:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:07,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:07,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699663190] [2021-07-09 18:43:07,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699663190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:07,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405080768] [2021-07-09 18:43:07,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:07,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:43:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:07,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:07,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405080768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:07,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:07,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:43:07,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624593840] [2021-07-09 18:43:07,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:07,293 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:07,608 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-09 18:43:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:43:07,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:07,614 INFO L225 Difference]: With dead ends: 1329 [2021-07-09 18:43:07,614 INFO L226 Difference]: Without dead ends: 1329 [2021-07-09 18:43:07,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:43:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-09 18:43:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-09 18:43:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-09 18:43:07,638 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-09 18:43:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:07,639 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-09 18:43:07,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-09 18:43:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:07,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:07,641 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] [2021-07-09 18:43:07,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:07,857 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-07-09 18:43:07,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:07,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115249716] [2021-07-09 18:43:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:07,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:07,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115249716] [2021-07-09 18:43:07,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115249716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:07,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612450709] [2021-07-09 18:43:07,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:07,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:07,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612450709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:07,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:07,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:43:07,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798549727] [2021-07-09 18:43:07,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:43:07,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:43:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:43:07,966 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:08,282 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-09 18:43:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:43:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:08,289 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 18:43:08,289 INFO L226 Difference]: Without dead ends: 1544 [2021-07-09 18:43:08,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:43:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-09 18:43:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-09 18:43:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-09 18:43:08,308 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-09 18:43:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:08,308 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-09 18:43:08,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-09 18:43:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:08,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:08,309 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] [2021-07-09 18:43:08,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:43:08,527 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:08,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-07-09 18:43:08,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:08,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433361303] [2021-07-09 18:43:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:08,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:08,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433361303] [2021-07-09 18:43:08,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433361303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:08,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554761440] [2021-07-09 18:43:08,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:08,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:08,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554761440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:08,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:08,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:08,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615475990] [2021-07-09 18:43:08,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:08,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:08,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:08,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:08,678 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:09,435 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-09 18:43:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:43:09,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:09,445 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 18:43:09,446 INFO L226 Difference]: Without dead ends: 2734 [2021-07-09 18:43:09,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:43:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-09 18:43:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-09 18:43:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-09 18:43:09,477 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-09 18:43:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:09,477 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-09 18:43:09,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-09 18:43:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:09,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:09,479 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] [2021-07-09 18:43:09,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:09,693 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:09,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-07-09 18:43:09,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:09,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117069271] [2021-07-09 18:43:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:09,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:09,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117069271] [2021-07-09 18:43:09,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117069271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:09,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20071570] [2021-07-09 18:43:09,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:09,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:09,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:09,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:09,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20071570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:09,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:09,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:09,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813984789] [2021-07-09 18:43:09,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:09,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:09,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:09,858 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:10,599 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-09 18:43:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:43:10,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:10,606 INFO L225 Difference]: With dead ends: 2693 [2021-07-09 18:43:10,607 INFO L226 Difference]: Without dead ends: 2693 [2021-07-09 18:43:10,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:43:10,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-09 18:43:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-09 18:43:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-09 18:43:10,635 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-09 18:43:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:10,635 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-09 18:43:10,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-09 18:43:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:10,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:10,637 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] [2021-07-09 18:43:10,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:43:10,854 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:10,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-07-09 18:43:10,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:10,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59536929] [2021-07-09 18:43:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:10,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:10,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59536929] [2021-07-09 18:43:10,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59536929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:10,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74746034] [2021-07-09 18:43:10,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:10,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:10,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:10,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74746034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:10,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:10,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:43:10,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472839964] [2021-07-09 18:43:10,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:43:10,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:43:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:10,999 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:11,654 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-09 18:43:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:43:11,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:11,660 INFO L225 Difference]: With dead ends: 2677 [2021-07-09 18:43:11,660 INFO L226 Difference]: Without dead ends: 2677 [2021-07-09 18:43:11,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:43:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-09 18:43:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-09 18:43:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-09 18:43:11,686 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-09 18:43:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:11,687 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-09 18:43:11,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-09 18:43:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:11,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:11,688 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] [2021-07-09 18:43:11,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:43:11,904 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-07-09 18:43:11,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688297621] [2021-07-09 18:43:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:11,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:11,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688297621] [2021-07-09 18:43:11,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688297621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:11,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021135049] [2021-07-09 18:43:11,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:43:11,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:12,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021135049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:12,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:12,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:43:12,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037343764] [2021-07-09 18:43:12,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:43:12,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:12,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:43:12,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:12,040 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:12,626 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-09 18:43:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:43:12,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:12,632 INFO L225 Difference]: With dead ends: 2474 [2021-07-09 18:43:12,632 INFO L226 Difference]: Without dead ends: 2470 [2021-07-09 18:43:12,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:43:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-09 18:43:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-09 18:43:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:12,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-09 18:43:12,666 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-09 18:43:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:12,666 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-09 18:43:12,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-09 18:43:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:12,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:12,668 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] [2021-07-09 18:43:12,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:43:12,885 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-07-09 18:43:12,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:12,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085578262] [2021-07-09 18:43:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:12,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085578262] [2021-07-09 18:43:12,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085578262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572888121] [2021-07-09 18:43:12,918 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:43:12,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:12,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:12,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:13,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572888121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:13,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:13,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:13,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143209563] [2021-07-09 18:43:13,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:13,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:13,042 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:13,677 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-09 18:43:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:13,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:13,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:13,683 INFO L225 Difference]: With dead ends: 2514 [2021-07-09 18:43:13,683 INFO L226 Difference]: Without dead ends: 2514 [2021-07-09 18:43:13,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 377.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:43:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-09 18:43:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-09 18:43:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-09 18:43:13,748 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-09 18:43:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:13,748 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-09 18:43:13,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-09 18:43:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:13,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:13,750 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] [2021-07-09 18:43:13,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:43:13,961 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-07-09 18:43:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:13,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897531699] [2021-07-09 18:43:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:13,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897531699] [2021-07-09 18:43:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897531699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720049769] [2021-07-09 18:43:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720049769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:14,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:14,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:14,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893724212] [2021-07-09 18:43:14,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:14,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:14,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:14,092 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:14,702 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-09 18:43:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:43:14,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:14,707 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 18:43:14,707 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 18:43:14,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:43:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 18:43:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-09 18:43:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-09 18:43:14,730 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-09 18:43:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:14,730 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-09 18:43:14,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-09 18:43:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:14,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:14,732 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:14,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:43:14,948 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-07-09 18:43:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:14,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616817294] [2021-07-09 18:43:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:14,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:14,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616817294] [2021-07-09 18:43:14,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616817294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:14,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654441370] [2021-07-09 18:43:14,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:15,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:43:15,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:43:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:15,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654441370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:15,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:43:15,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999418459] [2021-07-09 18:43:15,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:43:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:43:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:43:15,043 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:15,119 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-09 18:43:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:43:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:15,121 INFO L225 Difference]: With dead ends: 929 [2021-07-09 18:43:15,121 INFO L226 Difference]: Without dead ends: 929 [2021-07-09 18:43:15,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-09 18:43:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-09 18:43:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-09 18:43:15,134 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-09 18:43:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:15,134 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-09 18:43:15,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-09 18:43:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:15,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:15,136 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] [2021-07-09 18:43:15,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:15,352 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-07-09 18:43:15,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:15,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316721450] [2021-07-09 18:43:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316721450] [2021-07-09 18:43:15,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316721450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880273825] [2021-07-09 18:43:15,383 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 [2021-07-09 18:43:15,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:15,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:15,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:15,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880273825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:15,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:43:15,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201746923] [2021-07-09 18:43:15,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:43:15,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:43:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:43:15,467 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:15,743 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-09 18:43:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:43:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:15,746 INFO L225 Difference]: With dead ends: 1555 [2021-07-09 18:43:15,746 INFO L226 Difference]: Without dead ends: 1555 [2021-07-09 18:43:15,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:43:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-09 18:43:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-09 18:43:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-09 18:43:15,762 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-09 18:43:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:15,762 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-09 18:43:15,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-09 18:43:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:15,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:15,764 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] [2021-07-09 18:43:15,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:15,980 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-07-09 18:43:15,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:15,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052622178] [2021-07-09 18:43:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:16,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052622178] [2021-07-09 18:43:16,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052622178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234547211] [2021-07-09 18:43:16,016 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 [2021-07-09 18:43:16,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:16,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:16,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:16,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234547211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:16,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:16,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:43:16,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829061517] [2021-07-09 18:43:16,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:43:16,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:43:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:43:16,127 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:16,391 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-09 18:43:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:43:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:16,394 INFO L225 Difference]: With dead ends: 1605 [2021-07-09 18:43:16,394 INFO L226 Difference]: Without dead ends: 1605 [2021-07-09 18:43:16,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:43:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-09 18:43:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-09 18:43:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-09 18:43:16,412 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-09 18:43:16,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:16,412 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-09 18:43:16,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-09 18:43:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:16,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:16,415 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] [2021-07-09 18:43:16,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:16,631 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-07-09 18:43:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:16,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801899257] [2021-07-09 18:43:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:16,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:16,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801899257] [2021-07-09 18:43:16,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801899257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:16,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032849030] [2021-07-09 18:43:16,655 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 [2021-07-09 18:43:16,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:16,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:16,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:16,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032849030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:16,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:16,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:43:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413067410] [2021-07-09 18:43:16,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:43:16,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:16,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:43:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:43:16,734 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:16,948 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-09 18:43:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:43:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:16,951 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 18:43:16,951 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 18:43:16,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:43:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 18:43:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-09 18:43:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-09 18:43:16,967 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-09 18:43:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:16,968 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-09 18:43:16,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-09 18:43:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:16,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:16,969 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] [2021-07-09 18:43:17,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 18:43:17,185 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-07-09 18:43:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:17,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102704591] [2021-07-09 18:43:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:17,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:17,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102704591] [2021-07-09 18:43:17,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102704591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:17,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409164769] [2021-07-09 18:43:17,230 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 [2021-07-09 18:43:17,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:17,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:17,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409164769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:17,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:17,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:43:17,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898791865] [2021-07-09 18:43:17,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:43:17,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:43:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:43:17,293 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:17,501 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-09 18:43:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:43:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:17,504 INFO L225 Difference]: With dead ends: 1508 [2021-07-09 18:43:17,504 INFO L226 Difference]: Without dead ends: 1496 [2021-07-09 18:43:17,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:43:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-09 18:43:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-09 18:43:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-09 18:43:17,522 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-09 18:43:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:17,522 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-09 18:43:17,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-09 18:43:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:17,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:17,524 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] [2021-07-09 18:43:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:17,741 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-07-09 18:43:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698964803] [2021-07-09 18:43:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:17,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698964803] [2021-07-09 18:43:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698964803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845247573] [2021-07-09 18:43:17,771 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 [2021-07-09 18:43:17,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:43:17,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:17,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845247573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:17,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:17,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:17,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323132765] [2021-07-09 18:43:17,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:17,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:17,868 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:18,375 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-09 18:43:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:43:18,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:18,379 INFO L225 Difference]: With dead ends: 2412 [2021-07-09 18:43:18,379 INFO L226 Difference]: Without dead ends: 2412 [2021-07-09 18:43:18,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 329.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-09 18:43:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-09 18:43:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-09 18:43:18,403 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-09 18:43:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:18,403 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-09 18:43:18,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-09 18:43:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:18,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:18,405 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] [2021-07-09 18:43:18,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:43:18,621 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-07-09 18:43:18,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:18,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318333576] [2021-07-09 18:43:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:18,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:18,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318333576] [2021-07-09 18:43:18,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318333576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:18,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772701110] [2021-07-09 18:43:18,651 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 [2021-07-09 18:43:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:18,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772701110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:18,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:18,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:18,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69036686] [2021-07-09 18:43:18,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:18,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:18,775 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:19,253 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-09 18:43:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:43:19,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:19,257 INFO L225 Difference]: With dead ends: 2335 [2021-07-09 18:43:19,258 INFO L226 Difference]: Without dead ends: 2335 [2021-07-09 18:43:19,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-09 18:43:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-09 18:43:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:43:19,279 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:43:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:19,279 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:43:19,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:43:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:19,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:19,281 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] [2021-07-09 18:43:19,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:19,497 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:19,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-07-09 18:43:19,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:19,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34868568] [2021-07-09 18:43:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:19,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:19,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34868568] [2021-07-09 18:43:19,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34868568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:19,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896892296] [2021-07-09 18:43:19,526 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 [2021-07-09 18:43:19,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:19,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896892296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:19,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:19,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:43:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430009753] [2021-07-09 18:43:19,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:43:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:43:19,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:19,611 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:20,027 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-09 18:43:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:43:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:20,045 INFO L225 Difference]: With dead ends: 2285 [2021-07-09 18:43:20,045 INFO L226 Difference]: Without dead ends: 2285 [2021-07-09 18:43:20,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:43:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-09 18:43:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-09 18:43:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:43:20,064 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:43:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:20,064 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:43:20,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:43:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:20,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:20,066 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] [2021-07-09 18:43:20,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:43:20,273 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-07-09 18:43:20,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:20,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504475335] [2021-07-09 18:43:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:20,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:20,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504475335] [2021-07-09 18:43:20,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504475335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:20,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940963446] [2021-07-09 18:43:20,303 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 [2021-07-09 18:43:20,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:20,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:20,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940963446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:20,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:20,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:43:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786267643] [2021-07-09 18:43:20,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:43:20,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:43:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:20,382 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:20,743 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-09 18:43:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:43:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:20,747 INFO L225 Difference]: With dead ends: 2176 [2021-07-09 18:43:20,747 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 18:43:20,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:43:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 18:43:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-09 18:43:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:43:20,768 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:43:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:20,768 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:43:20,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:43:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:20,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:20,769 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] [2021-07-09 18:43:20,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:20,985 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-07-09 18:43:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:20,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119537996] [2021-07-09 18:43:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:21,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:21,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119537996] [2021-07-09 18:43:21,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119537996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:21,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307018310] [2021-07-09 18:43:21,015 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 [2021-07-09 18:43:21,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:21,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:21,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307018310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:21,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:21,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:21,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454519504] [2021-07-09 18:43:21,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:21,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:21,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:21,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:21,116 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:21,470 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-09 18:43:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:43:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:21,475 INFO L225 Difference]: With dead ends: 2199 [2021-07-09 18:43:21,476 INFO L226 Difference]: Without dead ends: 2199 [2021-07-09 18:43:21,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:43:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-09 18:43:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-09 18:43:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:43:21,494 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:43:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:21,494 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:43:21,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:43:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:21,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:21,496 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] [2021-07-09 18:43:21,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:43:21,712 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-07-09 18:43:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:21,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580624503] [2021-07-09 18:43:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:21,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:21,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580624503] [2021-07-09 18:43:21,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580624503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:21,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447905984] [2021-07-09 18:43:21,767 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 [2021-07-09 18:43:21,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:21,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:21,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447905984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:21,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:21,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:21,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362868086] [2021-07-09 18:43:21,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:21,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:21,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:21,860 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:22,195 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-09 18:43:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:43:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:22,199 INFO L225 Difference]: With dead ends: 2156 [2021-07-09 18:43:22,199 INFO L226 Difference]: Without dead ends: 2152 [2021-07-09 18:43:22,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:43:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-09 18:43:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-09 18:43:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:43:22,220 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:43:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:22,220 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:43:22,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:43:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:22,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:22,222 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] [2021-07-09 18:43:22,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:43:22,438 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-07-09 18:43:22,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:22,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143757169] [2021-07-09 18:43:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:22,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:22,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143757169] [2021-07-09 18:43:22,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143757169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:22,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015279236] [2021-07-09 18:43:22,481 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 [2021-07-09 18:43:22,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:43:22,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:22,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:22,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015279236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:22,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:22,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:43:22,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653406345] [2021-07-09 18:43:22,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:43:22,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:43:22,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:43:22,633 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:22,996 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-09 18:43:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:43:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:23,000 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:43:23,000 INFO L226 Difference]: Without dead ends: 2097 [2021-07-09 18:43:23,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:43:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-09 18:43:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-09 18:43:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-09 18:43:23,035 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-09 18:43:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:23,036 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-09 18:43:23,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-09 18:43:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:23,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:23,037 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] [2021-07-09 18:43:23,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:43:23,239 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:23,239 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-07-09 18:43:23,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:23,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038446308] [2021-07-09 18:43:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:23,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:23,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038446308] [2021-07-09 18:43:23,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038446308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:23,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603949924] [2021-07-09 18:43:23,289 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 [2021-07-09 18:43:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:23,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:23,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603949924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:23,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:23,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:43:23,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380802779] [2021-07-09 18:43:23,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:43:23,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:43:23,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:43:23,358 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:23,632 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-09 18:43:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:43:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:23,635 INFO L225 Difference]: With dead ends: 1963 [2021-07-09 18:43:23,635 INFO L226 Difference]: Without dead ends: 1959 [2021-07-09 18:43:23,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:43:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-09 18:43:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-09 18:43:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-09 18:43:23,654 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-09 18:43:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:23,654 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-09 18:43:23,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-09 18:43:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:23,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:23,656 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] [2021-07-09 18:43:23,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 18:43:23,872 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-07-09 18:43:23,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:23,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451539108] [2021-07-09 18:43:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:23,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:23,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451539108] [2021-07-09 18:43:23,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451539108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:23,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6009392] [2021-07-09 18:43:23,900 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 [2021-07-09 18:43:23,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:23,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:23,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6009392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:23,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:23,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:43:23,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428317950] [2021-07-09 18:43:23,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:43:23,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:23,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:43:23,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:43:23,968 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:24,154 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-09 18:43:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:43:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:24,157 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 18:43:24,157 INFO L226 Difference]: Without dead ends: 1716 [2021-07-09 18:43:24,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:43:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-09 18:43:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-09 18:43:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-09 18:43:24,175 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-09 18:43:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:24,175 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-09 18:43:24,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-09 18:43:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:24,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:24,177 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] [2021-07-09 18:43:24,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:24,393 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:24,393 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-07-09 18:43:24,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:24,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070046220] [2021-07-09 18:43:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:24,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:24,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070046220] [2021-07-09 18:43:24,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070046220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:24,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196832282] [2021-07-09 18:43:24,424 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 [2021-07-09 18:43:24,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:24,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:24,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196832282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:24,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:24,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:24,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45730167] [2021-07-09 18:43:24,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:24,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:24,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:24,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:24,583 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:24,886 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-09 18:43:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:43:24,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:24,890 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 18:43:24,890 INFO L226 Difference]: Without dead ends: 1821 [2021-07-09 18:43:24,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:43:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-09 18:43:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-09 18:43:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-09 18:43:24,915 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-09 18:43:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:24,915 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-09 18:43:24,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-09 18:43:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:24,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:24,917 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] [2021-07-09 18:43:25,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:43:25,133 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-07-09 18:43:25,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:25,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821731878] [2021-07-09 18:43:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821731878] [2021-07-09 18:43:25,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821731878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005897501] [2021-07-09 18:43:25,166 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 [2021-07-09 18:43:25,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:25,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:25,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:25,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005897501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:25,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:43:25,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130796182] [2021-07-09 18:43:25,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:43:25,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:25,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:43:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:43:25,251 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:25,514 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-09 18:43:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:43:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:25,517 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:43:25,517 INFO L226 Difference]: Without dead ends: 1786 [2021-07-09 18:43:25,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:43:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-09 18:43:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-09 18:43:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-09 18:43:25,546 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-09 18:43:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:25,546 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-09 18:43:25,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-09 18:43:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:43:25,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:25,548 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] [2021-07-09 18:43:25,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 18:43:25,765 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-07-09 18:43:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:25,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571682735] [2021-07-09 18:43:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:25,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571682735] [2021-07-09 18:43:25,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571682735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711811690] [2021-07-09 18:43:25,801 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 [2021-07-09 18:43:25,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:25,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:25,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:43:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711811690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:25,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:43:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883615574] [2021-07-09 18:43:25,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:43:25,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:43:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:43:25,885 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:26,075 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-09 18:43:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:43:26,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:43:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:26,078 INFO L225 Difference]: With dead ends: 1649 [2021-07-09 18:43:26,078 INFO L226 Difference]: Without dead ends: 1637 [2021-07-09 18:43:26,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:43:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-09 18:43:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-09 18:43:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-09 18:43:26,096 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-09 18:43:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:26,096 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-09 18:43:26,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-09 18:43:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:26,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:26,098 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:26,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:26,301 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-07-09 18:43:26,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:26,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181320980] [2021-07-09 18:43:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:26,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:26,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181320980] [2021-07-09 18:43:26,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181320980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:26,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535508995] [2021-07-09 18:43:26,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:26,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:26,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:26,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:43:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:26,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:26,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:26,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:43:26,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:26,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:26,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:26,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:43:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535508995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:26,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:26,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:43:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970673200] [2021-07-09 18:43:26,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:26,733 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:27,195 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-09 18:43:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:43:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:27,198 INFO L225 Difference]: With dead ends: 1517 [2021-07-09 18:43:27,198 INFO L226 Difference]: Without dead ends: 1502 [2021-07-09 18:43:27,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:43:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-09 18:43:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-09 18:43:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-09 18:43:27,215 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-09 18:43:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:27,215 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-09 18:43:27,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-09 18:43:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:27,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:27,217 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:27,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:43:27,421 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-07-09 18:43:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:27,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077377697] [2021-07-09 18:43:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:27,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:27,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077377697] [2021-07-09 18:43:27,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077377697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:27,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039169695] [2021-07-09 18:43:27,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:27,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:27,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:43:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:43:27,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:27,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:27,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:27,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:43:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:27,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039169695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:27,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:27,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:43:27,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351796857] [2021-07-09 18:43:27,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:43:27,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:27,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:43:27,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:43:27,882 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:28,651 INFO L93 Difference]: Finished difference Result 1498 states and 4907 transitions. [2021-07-09 18:43:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:43:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:28,654 INFO L225 Difference]: With dead ends: 1498 [2021-07-09 18:43:28,654 INFO L226 Difference]: Without dead ends: 1483 [2021-07-09 18:43:28,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:43:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-07-09 18:43:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1150. [2021-07-09 18:43:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-09 18:43:28,671 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-09 18:43:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:28,671 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-09 18:43:28,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-09 18:43:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:28,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:28,673 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] [2021-07-09 18:43:28,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:28,889 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-07-09 18:43:28,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:28,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419851324] [2021-07-09 18:43:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419851324] [2021-07-09 18:43:29,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419851324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363217527] [2021-07-09 18:43:29,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:43:29,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:43:29,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:29,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:43:29,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:43:29,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:29,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:43:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363217527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:29,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:43:29,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212625229] [2021-07-09 18:43:29,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:29,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:29,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:29,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:29,419 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:31,411 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-07-09 18:43:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:43:31,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:31,414 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 18:43:31,415 INFO L226 Difference]: Without dead ends: 1635 [2021-07-09 18:43:31,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1865.6ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:43:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-09 18:43:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-07-09 18:43:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-09 18:43:31,447 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-09 18:43:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:31,448 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-09 18:43:31,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-09 18:43:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:31,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:31,450 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:31,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:43:31,666 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:31,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-07-09 18:43:31,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:31,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966146648] [2021-07-09 18:43:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:31,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966146648] [2021-07-09 18:43:31,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966146648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533304264] [2021-07-09 18:43:31,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:31,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:43:31,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:43:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:32,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:32,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:32,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:43:32,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:43:32,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:32,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:32,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:43:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:32,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533304264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:32,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:32,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:43:32,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000628265] [2021-07-09 18:43:32,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:32,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:32,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:32,077 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:33,554 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-07-09 18:43:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:43:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:33,558 INFO L225 Difference]: With dead ends: 1879 [2021-07-09 18:43:33,558 INFO L226 Difference]: Without dead ends: 1864 [2021-07-09 18:43:33,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1153.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:43:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-07-09 18:43:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-07-09 18:43:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-09 18:43:33,578 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-09 18:43:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:33,578 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-09 18:43:33,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-09 18:43:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:33,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:33,580 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] [2021-07-09 18:43:33,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:43:33,796 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-07-09 18:43:33,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:33,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832763590] [2021-07-09 18:43:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:34,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:34,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832763590] [2021-07-09 18:43:34,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832763590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:34,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115480079] [2021-07-09 18:43:34,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:43:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:34,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:34,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:34,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:43:34,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:34,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:34,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:34,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:43:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:34,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115480079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:34,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:34,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:43:34,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881885151] [2021-07-09 18:43:34,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:34,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:34,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:34,355 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:36,268 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-07-09 18:43:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:36,698 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-07-09 18:43:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:43:36,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:36,703 INFO L225 Difference]: With dead ends: 1869 [2021-07-09 18:43:36,703 INFO L226 Difference]: Without dead ends: 1854 [2021-07-09 18:43:36,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2192.9ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:43:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-07-09 18:43:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-07-09 18:43:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-09 18:43:36,721 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-09 18:43:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:36,721 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-09 18:43:36,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-09 18:43:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:36,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:36,723 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] [2021-07-09 18:43:36,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:36,937 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-07-09 18:43:36,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:36,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951846162] [2021-07-09 18:43:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:37,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:37,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951846162] [2021-07-09 18:43:37,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951846162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:37,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625659519] [2021-07-09 18:43:37,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:37,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:37,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:43:37,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:37,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:37,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-07-09 18:43:37,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:43:37,759 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-09 18:43:37,759 INFO L628 ElimStorePlain]: treesize reduction 131, result has 54.2 percent of original size [2021-07-09 18:43:37,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:37,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:692 [2021-07-09 18:43:38,289 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-07-09 18:43:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:38,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625659519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:38,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:38,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:43:38,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955110383] [2021-07-09 18:43:38,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:43:38,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:43:38,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:43:38,474 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:40,043 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2021-07-09 18:43:40,540 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-09 18:43:40,803 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-07-09 18:43:40,979 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-07-09 18:43:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:41,025 INFO L93 Difference]: Finished difference Result 2129 states and 6755 transitions. [2021-07-09 18:43:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:43:41,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:41,029 INFO L225 Difference]: With dead ends: 2129 [2021-07-09 18:43:41,029 INFO L226 Difference]: Without dead ends: 2114 [2021-07-09 18:43:41,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2590.5ms TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:43:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-07-09 18:43:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1219. [2021-07-09 18:43:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-07-09 18:43:41,050 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-07-09 18:43:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:41,050 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-07-09 18:43:41,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-07-09 18:43:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:41,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:41,052 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:41,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 18:43:41,269 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-07-09 18:43:41,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:41,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380771004] [2021-07-09 18:43:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:41,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:41,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380771004] [2021-07-09 18:43:41,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380771004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:41,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635435368] [2021-07-09 18:43:41,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:43:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:41,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:41,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:43:41,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:41,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:41,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:41,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:43:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:41,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635435368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:41,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:41,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:43:41,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245207021] [2021-07-09 18:43:41,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:41,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:41,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:41,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:41,723 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:42,367 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-07-09 18:43:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:43:42,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:42,370 INFO L225 Difference]: With dead ends: 1622 [2021-07-09 18:43:42,370 INFO L226 Difference]: Without dead ends: 1607 [2021-07-09 18:43:42,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:43:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-07-09 18:43:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-07-09 18:43:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-07-09 18:43:42,412 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-07-09 18:43:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:42,412 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-07-09 18:43:42,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-07-09 18:43:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:42,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:42,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:42,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:42,631 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:42,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-07-09 18:43:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:42,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943746234] [2021-07-09 18:43:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:42,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:42,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943746234] [2021-07-09 18:43:42,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943746234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:42,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870495861] [2021-07-09 18:43:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:42,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:42,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:42,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:43:42,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:43,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:43,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:43:43,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:43:43,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:43,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:43,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:117 [2021-07-09 18:43:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:43,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870495861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:43,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:43,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:43:43,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759805036] [2021-07-09 18:43:43,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:43:43,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:43,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:43:43,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:43:43,211 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-09 18:43:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:45,142 INFO L93 Difference]: Finished difference Result 1952 states and 6191 transitions. [2021-07-09 18:43:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:43:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:45,146 INFO L225 Difference]: With dead ends: 1952 [2021-07-09 18:43:45,146 INFO L226 Difference]: Without dead ends: 1937 [2021-07-09 18:43:45,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1738.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:43:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-07-09 18:43:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1241. [2021-07-09 18:43:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-07-09 18:43:45,167 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-07-09 18:43:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:45,167 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-07-09 18:43:45,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-09 18:43:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-07-09 18:43:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:45,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:45,169 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:45,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 18:43:45,385 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-07-09 18:43:45,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:45,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513699366] [2021-07-09 18:43:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:45,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:45,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513699366] [2021-07-09 18:43:45,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513699366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:45,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977138065] [2021-07-09 18:43:45,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:43:45,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:43:45,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:45,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:45,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:43:45,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:45,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:45,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:45,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-07-09 18:43:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:45,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977138065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:45,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:45,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:43:45,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013957184] [2021-07-09 18:43:45,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:45,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:45,836 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:46,565 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-07-09 18:43:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:43:46,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:46,569 INFO L225 Difference]: With dead ends: 1876 [2021-07-09 18:43:46,569 INFO L226 Difference]: Without dead ends: 1861 [2021-07-09 18:43:46,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:43:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-07-09 18:43:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-07-09 18:43:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-07-09 18:43:46,588 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-07-09 18:43:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:46,588 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-07-09 18:43:46,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-07-09 18:43:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:46,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:46,590 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:46,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:46,805 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-07-09 18:43:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:46,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381433002] [2021-07-09 18:43:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:46,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:46,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381433002] [2021-07-09 18:43:46,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381433002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:46,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754557307] [2021-07-09 18:43:46,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:47,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:47,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:47,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:43:47,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:47,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:47,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:43:47,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:47,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:47,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:47,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:43:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:47,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754557307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:47,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:47,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:43:47,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204048447] [2021-07-09 18:43:47,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:47,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:47,158 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:48,232 INFO L93 Difference]: Finished difference Result 2069 states and 6711 transitions. [2021-07-09 18:43:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:43:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:48,236 INFO L225 Difference]: With dead ends: 2069 [2021-07-09 18:43:48,236 INFO L226 Difference]: Without dead ends: 2054 [2021-07-09 18:43:48,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:43:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-07-09 18:43:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1246. [2021-07-09 18:43:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-07-09 18:43:48,258 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-07-09 18:43:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:48,258 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-07-09 18:43:48,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-07-09 18:43:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:48,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:48,260 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:48,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:43:48,477 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:48,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 11 times [2021-07-09 18:43:48,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:48,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894480638] [2021-07-09 18:43:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:48,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:48,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894480638] [2021-07-09 18:43:48,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894480638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:48,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694317555] [2021-07-09 18:43:48,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:48,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:48,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:48,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:43:48,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:48,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:48,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:48,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:43:48,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:48,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:48,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:48,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:43:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:48,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694317555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:48,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:48,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:43:48,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290698309] [2021-07-09 18:43:48,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:43:48,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:43:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:43:48,906 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:50,234 INFO L93 Difference]: Finished difference Result 1790 states and 5829 transitions. [2021-07-09 18:43:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:43:50,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:50,237 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:43:50,238 INFO L226 Difference]: Without dead ends: 1775 [2021-07-09 18:43:50,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1028.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:43:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-07-09 18:43:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1249. [2021-07-09 18:43:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.3621794871794872) internal successors, (4196), 1248 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4196 transitions. [2021-07-09 18:43:50,279 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4196 transitions. Word has length 26 [2021-07-09 18:43:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:50,279 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4196 transitions. [2021-07-09 18:43:50,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4196 transitions. [2021-07-09 18:43:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:50,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:50,281 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:50,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:43:50,489 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1617260987, now seen corresponding path program 12 times [2021-07-09 18:43:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:50,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632495828] [2021-07-09 18:43:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:50,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:50,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632495828] [2021-07-09 18:43:50,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632495828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:50,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926437616] [2021-07-09 18:43:50,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:50,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:43:50,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:50,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:43:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:50,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:50,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:43:50,822 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:43:50,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:50,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:50,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:43:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:50,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926437616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:50,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:50,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:43:50,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994828564] [2021-07-09 18:43:50,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:50,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:50,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:50,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:50,878 INFO L87 Difference]: Start difference. First operand 1249 states and 4196 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:51,950 INFO L93 Difference]: Finished difference Result 2008 states and 6519 transitions. [2021-07-09 18:43:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:43:51,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:51,953 INFO L225 Difference]: With dead ends: 2008 [2021-07-09 18:43:51,953 INFO L226 Difference]: Without dead ends: 1993 [2021-07-09 18:43:51,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 901.6ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:43:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-07-09 18:43:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1246. [2021-07-09 18:43:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-07-09 18:43:51,973 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-07-09 18:43:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:51,973 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-07-09 18:43:51,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:51,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-07-09 18:43:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:51,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:51,975 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] [2021-07-09 18:43:52,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:52,177 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-07-09 18:43:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:52,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781015195] [2021-07-09 18:43:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:52,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:52,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781015195] [2021-07-09 18:43:52,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781015195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:52,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259119514] [2021-07-09 18:43:52,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:52,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:52,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:52,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:43:52,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:52,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:52,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:52,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:43:52,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:52,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:52,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:52,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:43:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:52,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259119514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:52,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:52,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 18:43:52,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165343424] [2021-07-09 18:43:52,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:52,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:52,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:52,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:52,589 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:43:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:54,275 INFO L93 Difference]: Finished difference Result 2877 states and 8904 transitions. [2021-07-09 18:43:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:43:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:54,281 INFO L225 Difference]: With dead ends: 2877 [2021-07-09 18:43:54,281 INFO L226 Difference]: Without dead ends: 2832 [2021-07-09 18:43:54,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1427.7ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:43:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-09 18:43:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1292. [2021-07-09 18:43:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-07-09 18:43:54,308 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-07-09 18:43:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:54,308 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-07-09 18:43:54,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:43:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-07-09 18:43:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:54,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:54,312 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] [2021-07-09 18:43:54,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:43:54,520 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:54,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-07-09 18:43:54,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:54,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403580983] [2021-07-09 18:43:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:54,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:54,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403580983] [2021-07-09 18:43:54,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403580983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:54,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360742511] [2021-07-09 18:43:54,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:54,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:54,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:43:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:54,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:54,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:54,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:54,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:43:54,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:54,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:54,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:54,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:43:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360742511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:54,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:54,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 18:43:54,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102618507] [2021-07-09 18:43:54,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:54,919 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:43:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:56,498 INFO L93 Difference]: Finished difference Result 2732 states and 8592 transitions. [2021-07-09 18:43:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:43:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:56,504 INFO L225 Difference]: With dead ends: 2732 [2021-07-09 18:43:56,504 INFO L226 Difference]: Without dead ends: 2687 [2021-07-09 18:43:56,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1341.2ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:43:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-07-09 18:43:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1288. [2021-07-09 18:43:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-07-09 18:43:56,533 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-07-09 18:43:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:56,534 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-07-09 18:43:56,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:43:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-07-09 18:43:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:56,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:56,536 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] [2021-07-09 18:43:56,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:43:56,751 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-07-09 18:43:56,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:56,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578643600] [2021-07-09 18:43:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:56,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:56,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578643600] [2021-07-09 18:43:56,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578643600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:56,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939862945] [2021-07-09 18:43:56,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:56,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:43:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:43:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:57,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:57,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-09 18:43:57,082 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:43:57,097 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-07-09 18:43:57,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:57,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:43:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:57,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939862945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:57,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:57,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 18:43:57,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442496291] [2021-07-09 18:43:57,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:43:57,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:43:57,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:43:57,138 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:43:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:59,107 INFO L93 Difference]: Finished difference Result 3013 states and 9417 transitions. [2021-07-09 18:43:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:43:59,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:43:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:59,113 INFO L225 Difference]: With dead ends: 3013 [2021-07-09 18:43:59,113 INFO L226 Difference]: Without dead ends: 2968 [2021-07-09 18:43:59,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1673.3ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:43:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-07-09 18:43:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1292. [2021-07-09 18:43:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-07-09 18:43:59,141 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-07-09 18:43:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:59,142 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-07-09 18:43:59,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:43:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-07-09 18:43:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:43:59,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:59,144 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:59,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:43:59,360 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-07-09 18:43:59,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:59,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678962305] [2021-07-09 18:43:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:59,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:59,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678962305] [2021-07-09 18:43:59,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678962305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:59,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921658722] [2021-07-09 18:43:59,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:43:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:59,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:59,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:43:59,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:59,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:59,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:59,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:43:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:59,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921658722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:59,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:59,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:43:59,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654163285] [2021-07-09 18:43:59,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:59,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:59,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:59,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:59,757 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:00,185 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-07-09 18:44:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:44:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:00,188 INFO L225 Difference]: With dead ends: 1654 [2021-07-09 18:44:00,188 INFO L226 Difference]: Without dead ends: 1639 [2021-07-09 18:44:00,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:44:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-07-09 18:44:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-07-09 18:44:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-07-09 18:44:00,206 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-07-09 18:44:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:00,206 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-07-09 18:44:00,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-07-09 18:44:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:00,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:00,208 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:00,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:00,424 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-07-09 18:44:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:00,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904215701] [2021-07-09 18:44:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:00,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:00,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904215701] [2021-07-09 18:44:00,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904215701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:00,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030748053] [2021-07-09 18:44:00,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:00,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:00,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:44:00,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:00,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:44:00,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:00,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:00,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:00,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:100 [2021-07-09 18:44:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:00,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030748053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:00,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:00,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:44:00,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690130095] [2021-07-09 18:44:00,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:00,961 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:02,455 INFO L93 Difference]: Finished difference Result 2013 states and 6430 transitions. [2021-07-09 18:44:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:44:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:02,459 INFO L225 Difference]: With dead ends: 2013 [2021-07-09 18:44:02,459 INFO L226 Difference]: Without dead ends: 1983 [2021-07-09 18:44:02,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1361.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:44:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-07-09 18:44:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1297. [2021-07-09 18:44:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-07-09 18:44:02,480 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-07-09 18:44:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:02,480 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-07-09 18:44:02,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-07-09 18:44:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:02,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:02,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:02,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:02,684 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:02,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-07-09 18:44:02,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:02,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089663546] [2021-07-09 18:44:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:02,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:02,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089663546] [2021-07-09 18:44:02,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089663546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:02,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345038085] [2021-07-09 18:44:02,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:02,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:44:02,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:02,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:44:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:03,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:03,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:44:03,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:03,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:03,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:03,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-09 18:44:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:03,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345038085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:03,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:03,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:44:03,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744221218] [2021-07-09 18:44:03,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:03,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:03,140 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:04,482 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-07-09 18:44:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:44:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:04,486 INFO L225 Difference]: With dead ends: 2000 [2021-07-09 18:44:04,486 INFO L226 Difference]: Without dead ends: 1985 [2021-07-09 18:44:04,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:44:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-07-09 18:44:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1289. [2021-07-09 18:44:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3944099378881987) internal successors, (4372), 1288 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4372 transitions. [2021-07-09 18:44:04,507 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4372 transitions. Word has length 26 [2021-07-09 18:44:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:04,507 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4372 transitions. [2021-07-09 18:44:04,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4372 transitions. [2021-07-09 18:44:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:04,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:04,509 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:04,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:04,724 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:04,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-07-09 18:44:04,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:04,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139145172] [2021-07-09 18:44:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:04,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:04,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139145172] [2021-07-09 18:44:04,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139145172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:04,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558639090] [2021-07-09 18:44:04,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:04,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:04,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:04,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:44:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:05,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:05,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:44:05,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:05,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:05,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:05,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:44:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:05,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558639090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:05,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:05,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:44:05,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443145044] [2021-07-09 18:44:05,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:05,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:05,093 INFO L87 Difference]: Start difference. First operand 1289 states and 4372 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:06,154 INFO L93 Difference]: Finished difference Result 2049 states and 6731 transitions. [2021-07-09 18:44:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:44:06,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:06,157 INFO L225 Difference]: With dead ends: 2049 [2021-07-09 18:44:06,157 INFO L226 Difference]: Without dead ends: 2034 [2021-07-09 18:44:06,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 950.7ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:44:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-07-09 18:44:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1298. [2021-07-09 18:44:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.3939861218195837) internal successors, (4402), 1297 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4402 transitions. [2021-07-09 18:44:06,178 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4402 transitions. Word has length 26 [2021-07-09 18:44:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:06,178 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4402 transitions. [2021-07-09 18:44:06,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4402 transitions. [2021-07-09 18:44:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:06,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:06,180 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:06,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:06,396 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:06,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 17 times [2021-07-09 18:44:06,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:06,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072639283] [2021-07-09 18:44:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:06,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:06,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072639283] [2021-07-09 18:44:06,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072639283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:06,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623652287] [2021-07-09 18:44:06,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:06,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:44:06,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:06,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:44:06,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:06,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:44:06,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:06,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:06,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:06,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:44:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:06,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623652287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:06,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:06,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:44:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110593118] [2021-07-09 18:44:06,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:06,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:06,810 INFO L87 Difference]: Start difference. First operand 1298 states and 4402 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:07,761 INFO L93 Difference]: Finished difference Result 1774 states and 5862 transitions. [2021-07-09 18:44:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:44:07,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:07,765 INFO L225 Difference]: With dead ends: 1774 [2021-07-09 18:44:07,765 INFO L226 Difference]: Without dead ends: 1759 [2021-07-09 18:44:07,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 845.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:44:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-07-09 18:44:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1301. [2021-07-09 18:44:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3953846153846152) internal successors, (4414), 1300 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4414 transitions. [2021-07-09 18:44:07,784 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4414 transitions. Word has length 26 [2021-07-09 18:44:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:07,784 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4414 transitions. [2021-07-09 18:44:07,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4414 transitions. [2021-07-09 18:44:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:07,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:07,787 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:07,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-09 18:44:07,996 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 18 times [2021-07-09 18:44:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:07,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681872364] [2021-07-09 18:44:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:08,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:08,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681872364] [2021-07-09 18:44:08,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681872364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:08,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632807407] [2021-07-09 18:44:08,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:08,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:08,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:08,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:08,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:44:08,420 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:44:08,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:08,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:08,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:44:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:08,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632807407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:08,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:08,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:44:08,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534641311] [2021-07-09 18:44:08,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:08,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:08,465 INFO L87 Difference]: Start difference. First operand 1301 states and 4414 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-07-09 18:44:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:09,368 INFO L93 Difference]: Finished difference Result 2057 states and 6754 transitions. [2021-07-09 18:44:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:44:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:09,373 INFO L225 Difference]: With dead ends: 2057 [2021-07-09 18:44:09,373 INFO L226 Difference]: Without dead ends: 2042 [2021-07-09 18:44:09,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 803.8ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:44:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-07-09 18:44:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1295. [2021-07-09 18:44:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.39258114374034) internal successors, (4390), 1294 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4390 transitions. [2021-07-09 18:44:09,398 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4390 transitions. Word has length 26 [2021-07-09 18:44:09,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:09,398 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4390 transitions. [2021-07-09 18:44:09,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-07-09 18:44:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4390 transitions. [2021-07-09 18:44:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:09,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:09,401 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:09,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:09,604 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-07-09 18:44:09,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:09,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601725129] [2021-07-09 18:44:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:09,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601725129] [2021-07-09 18:44:09,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601725129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438684623] [2021-07-09 18:44:09,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:44:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:09,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:09,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:44:09,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:09,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:09,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:09,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:44:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:10,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438684623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:10,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:10,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:44:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474022525] [2021-07-09 18:44:10,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:10,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:10,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:10,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:10,002 INFO L87 Difference]: Start difference. First operand 1295 states and 4390 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:10,460 INFO L93 Difference]: Finished difference Result 1746 states and 5752 transitions. [2021-07-09 18:44:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:44:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:10,463 INFO L225 Difference]: With dead ends: 1746 [2021-07-09 18:44:10,463 INFO L226 Difference]: Without dead ends: 1725 [2021-07-09 18:44:10,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:44:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-07-09 18:44:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1336. [2021-07-09 18:44:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.3872659176029964) internal successors, (4522), 1335 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4522 transitions. [2021-07-09 18:44:10,481 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4522 transitions. Word has length 26 [2021-07-09 18:44:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:10,482 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4522 transitions. [2021-07-09 18:44:10,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4522 transitions. [2021-07-09 18:44:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:10,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:10,484 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:10,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:10,701 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-07-09 18:44:10,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:10,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155339570] [2021-07-09 18:44:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:10,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155339570] [2021-07-09 18:44:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155339570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143175077] [2021-07-09 18:44:10,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:10,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:10,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:10,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:44:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:11,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:11,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:44:11,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:11,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:11,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:11,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-09 18:44:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:11,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143175077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:11,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:11,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:44:11,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885826915] [2021-07-09 18:44:11,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:11,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:11,229 INFO L87 Difference]: Start difference. First operand 1336 states and 4522 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:12,300 INFO L93 Difference]: Finished difference Result 2131 states and 6881 transitions. [2021-07-09 18:44:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:44:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:12,304 INFO L225 Difference]: With dead ends: 2131 [2021-07-09 18:44:12,304 INFO L226 Difference]: Without dead ends: 2106 [2021-07-09 18:44:12,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 897.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:44:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-07-09 18:44:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1348. [2021-07-09 18:44:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3919821826280625) internal successors, (4569), 1347 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4569 transitions. [2021-07-09 18:44:12,329 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4569 transitions. Word has length 26 [2021-07-09 18:44:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:12,329 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4569 transitions. [2021-07-09 18:44:12,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4569 transitions. [2021-07-09 18:44:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:12,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:12,332 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:12,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:12,537 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 21 times [2021-07-09 18:44:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:12,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445710436] [2021-07-09 18:44:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:12,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445710436] [2021-07-09 18:44:12,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445710436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023262425] [2021-07-09 18:44:12,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:12,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:44:12,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:12,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:44:12,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:12,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:12,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:44:12,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:12,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:12,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:12,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-09 18:44:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:13,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023262425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:13,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:13,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:44:13,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651840012] [2021-07-09 18:44:13,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:13,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:13,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:13,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:13,059 INFO L87 Difference]: Start difference. First operand 1348 states and 4569 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:13,918 INFO L93 Difference]: Finished difference Result 1900 states and 6269 transitions. [2021-07-09 18:44:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:44:13,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:13,922 INFO L225 Difference]: With dead ends: 1900 [2021-07-09 18:44:13,922 INFO L226 Difference]: Without dead ends: 1875 [2021-07-09 18:44:13,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:44:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-09 18:44:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1361. [2021-07-09 18:44:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.398529411764706) internal successors, (4622), 1360 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4622 transitions. [2021-07-09 18:44:13,945 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4622 transitions. Word has length 26 [2021-07-09 18:44:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:13,945 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4622 transitions. [2021-07-09 18:44:13,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4622 transitions. [2021-07-09 18:44:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:13,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:13,947 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:14,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:14,164 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:14,164 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 22 times [2021-07-09 18:44:14,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:14,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919967209] [2021-07-09 18:44:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:14,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919967209] [2021-07-09 18:44:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919967209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127580994] [2021-07-09 18:44:14,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:14,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:14,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:44:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:14,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:14,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:44:14,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:14,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:14,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:14,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:44:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:14,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127580994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:14,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:14,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:44:14,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965533813] [2021-07-09 18:44:14,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:14,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:14,565 INFO L87 Difference]: Start difference. First operand 1361 states and 4622 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:44:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:14,967 INFO L93 Difference]: Finished difference Result 1726 states and 5748 transitions. [2021-07-09 18:44:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:44:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:14,970 INFO L225 Difference]: With dead ends: 1726 [2021-07-09 18:44:14,970 INFO L226 Difference]: Without dead ends: 1711 [2021-07-09 18:44:14,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:44:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-07-09 18:44:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1372. [2021-07-09 18:44:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.3982494529540483) internal successors, (4659), 1371 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4659 transitions. [2021-07-09 18:44:14,989 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4659 transitions. Word has length 26 [2021-07-09 18:44:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:14,989 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4659 transitions. [2021-07-09 18:44:14,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:44:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4659 transitions. [2021-07-09 18:44:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:14,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:14,992 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:15,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 18:44:15,208 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 23 times [2021-07-09 18:44:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:15,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438354415] [2021-07-09 18:44:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:15,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:15,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438354415] [2021-07-09 18:44:15,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438354415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:15,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495368407] [2021-07-09 18:44:15,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:15,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:44:15,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:15,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:44:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:15,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:15,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:44:15,588 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:44:15,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:15,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:15,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:44:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:15,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495368407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:15,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:15,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:44:15,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967094605] [2021-07-09 18:44:15,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:15,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:15,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:15,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:15,641 INFO L87 Difference]: Start difference. First operand 1372 states and 4659 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-07-09 18:44:16,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:16,486 INFO L93 Difference]: Finished difference Result 2060 states and 6782 transitions. [2021-07-09 18:44:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:44:16,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:16,490 INFO L225 Difference]: With dead ends: 2060 [2021-07-09 18:44:16,490 INFO L226 Difference]: Without dead ends: 2041 [2021-07-09 18:44:16,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 780.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:44:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-07-09 18:44:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1373. [2021-07-09 18:44:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.401603498542274) internal successors, (4667), 1372 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4667 transitions. [2021-07-09 18:44:16,512 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4667 transitions. Word has length 26 [2021-07-09 18:44:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:16,512 INFO L482 AbstractCegarLoop]: Abstraction has 1373 states and 4667 transitions. [2021-07-09 18:44:16,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-07-09 18:44:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4667 transitions. [2021-07-09 18:44:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:16,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:16,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:16,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:16,729 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 24 times [2021-07-09 18:44:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981438491] [2021-07-09 18:44:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:16,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981438491] [2021-07-09 18:44:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981438491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799784568] [2021-07-09 18:44:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:16,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:16,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:44:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:17,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:17,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:17,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:44:17,075 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:44:17,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:17,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:17,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:44:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799784568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:17,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:17,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:44:17,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346905585] [2021-07-09 18:44:17,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:17,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:17,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:17,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:17,128 INFO L87 Difference]: Start difference. First operand 1373 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:17,782 INFO L93 Difference]: Finished difference Result 1917 states and 6334 transitions. [2021-07-09 18:44:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:44:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:17,786 INFO L225 Difference]: With dead ends: 1917 [2021-07-09 18:44:17,786 INFO L226 Difference]: Without dead ends: 1892 [2021-07-09 18:44:17,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 659.5ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:44:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-07-09 18:44:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1379. [2021-07-09 18:44:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.399854862119013) internal successors, (4685), 1378 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4685 transitions. [2021-07-09 18:44:17,810 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4685 transitions. Word has length 26 [2021-07-09 18:44:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:17,810 INFO L482 AbstractCegarLoop]: Abstraction has 1379 states and 4685 transitions. [2021-07-09 18:44:17,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4685 transitions. [2021-07-09 18:44:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:17,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:17,812 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] [2021-07-09 18:44:18,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:18,028 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-07-09 18:44:18,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:18,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690923743] [2021-07-09 18:44:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:18,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690923743] [2021-07-09 18:44:18,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690923743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203875035] [2021-07-09 18:44:18,272 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:18,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:18,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:18,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:18,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:18,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:18,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:44:18,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:18,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:18,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:18,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:44:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:18,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203875035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:18,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:18,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:44:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640375688] [2021-07-09 18:44:18,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:18,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:18,473 INFO L87 Difference]: Start difference. First operand 1379 states and 4685 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:19,289 INFO L93 Difference]: Finished difference Result 1799 states and 5934 transitions. [2021-07-09 18:44:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:44:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:19,293 INFO L225 Difference]: With dead ends: 1799 [2021-07-09 18:44:19,293 INFO L226 Difference]: Without dead ends: 1773 [2021-07-09 18:44:19,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 816.3ms TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:44:19,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-07-09 18:44:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1391. [2021-07-09 18:44:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-07-09 18:44:19,313 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-07-09 18:44:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:19,314 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-07-09 18:44:19,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-07-09 18:44:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:19,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:19,316 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] [2021-07-09 18:44:19,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:19,525 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:19,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-07-09 18:44:19,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:19,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116900244] [2021-07-09 18:44:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:19,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116900244] [2021-07-09 18:44:19,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116900244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896645786] [2021-07-09 18:44:19,768 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:19,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:19,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:19,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:19,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:19,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:44:19,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:19,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:19,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:19,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:44:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:19,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896645786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:19,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:19,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:44:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546688474] [2021-07-09 18:44:19,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:19,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:19,922 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:20,953 INFO L93 Difference]: Finished difference Result 1991 states and 6577 transitions. [2021-07-09 18:44:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:44:20,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:20,957 INFO L225 Difference]: With dead ends: 1991 [2021-07-09 18:44:20,958 INFO L226 Difference]: Without dead ends: 1976 [2021-07-09 18:44:20,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 962.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:44:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-07-09 18:44:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1391. [2021-07-09 18:44:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-07-09 18:44:20,979 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-07-09 18:44:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:20,979 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-07-09 18:44:20,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-07-09 18:44:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:20,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:20,981 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:21,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:21,196 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 25 times [2021-07-09 18:44:21,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:21,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224687047] [2021-07-09 18:44:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:21,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:21,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224687047] [2021-07-09 18:44:21,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224687047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422641342] [2021-07-09 18:44:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:44:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:21,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:44:21,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:21,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:21,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:21,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:44:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422641342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:21,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:44:21,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109772419] [2021-07-09 18:44:21,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:21,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:21,598 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:44:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:22,262 INFO L93 Difference]: Finished difference Result 1897 states and 6187 transitions. [2021-07-09 18:44:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:44:22,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:22,266 INFO L225 Difference]: With dead ends: 1897 [2021-07-09 18:44:22,266 INFO L226 Difference]: Without dead ends: 1882 [2021-07-09 18:44:22,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:44:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-07-09 18:44:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1402. [2021-07-09 18:44:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.3954318344039973) internal successors, (4757), 1401 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4757 transitions. [2021-07-09 18:44:22,286 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4757 transitions. Word has length 26 [2021-07-09 18:44:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:22,286 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4757 transitions. [2021-07-09 18:44:22,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:44:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4757 transitions. [2021-07-09 18:44:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:22,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:22,288 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] [2021-07-09 18:44:22,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-09 18:44:22,504 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:22,504 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-07-09 18:44:22,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:22,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060612343] [2021-07-09 18:44:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:22,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060612343] [2021-07-09 18:44:22,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060612343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370052282] [2021-07-09 18:44:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:22,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:22,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:44:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:22,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:22,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:22,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:44:22,951 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:44:22,966 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-09 18:44:22,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:22,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2021-07-09 18:44:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:23,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370052282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:23,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:23,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:44:23,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980120588] [2021-07-09 18:44:23,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:44:23,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:23,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:44:23,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:44:23,003 INFO L87 Difference]: Start difference. First operand 1402 states and 4757 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:24,783 INFO L93 Difference]: Finished difference Result 2292 states and 7266 transitions. [2021-07-09 18:44:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:44:24,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:24,788 INFO L225 Difference]: With dead ends: 2292 [2021-07-09 18:44:24,788 INFO L226 Difference]: Without dead ends: 2248 [2021-07-09 18:44:24,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1570.8ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:44:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-07-09 18:44:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1409. [2021-07-09 18:44:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3963068181818183) internal successors, (4782), 1408 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4782 transitions. [2021-07-09 18:44:24,810 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4782 transitions. Word has length 26 [2021-07-09 18:44:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:24,810 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4782 transitions. [2021-07-09 18:44:24,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4782 transitions. [2021-07-09 18:44:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:24,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:24,812 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] [2021-07-09 18:44:25,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 18:44:25,017 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-07-09 18:44:25,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:25,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783796426] [2021-07-09 18:44:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:25,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:25,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783796426] [2021-07-09 18:44:25,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783796426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:25,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464183807] [2021-07-09 18:44:25,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:25,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:44:25,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:25,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:44:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:25,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:25,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:25,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:25,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:44:25,428 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:44:25,447 INFO L628 ElimStorePlain]: treesize reduction 15, result has 60.5 percent of original size [2021-07-09 18:44:25,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:25,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:35 [2021-07-09 18:44:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:25,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464183807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:25,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:25,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:44:25,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978623837] [2021-07-09 18:44:25,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:44:25,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:25,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:44:25,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:44:25,508 INFO L87 Difference]: Start difference. First operand 1409 states and 4782 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:26,857 INFO L93 Difference]: Finished difference Result 2493 states and 8039 transitions. [2021-07-09 18:44:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:44:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:26,862 INFO L225 Difference]: With dead ends: 2493 [2021-07-09 18:44:26,862 INFO L226 Difference]: Without dead ends: 2478 [2021-07-09 18:44:26,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1220.6ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:44:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-07-09 18:44:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1419. [2021-07-09 18:44:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3970380818053596) internal successors, (4817), 1418 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4817 transitions. [2021-07-09 18:44:26,885 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4817 transitions. Word has length 26 [2021-07-09 18:44:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:26,885 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4817 transitions. [2021-07-09 18:44:26,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4817 transitions. [2021-07-09 18:44:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:26,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:26,887 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:27,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:27,103 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash 558815383, now seen corresponding path program 26 times [2021-07-09 18:44:27,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:27,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346730186] [2021-07-09 18:44:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:27,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:27,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346730186] [2021-07-09 18:44:27,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346730186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:27,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388371502] [2021-07-09 18:44:27,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:27,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:44:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:27,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-07-09 18:44:27,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:27,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:27,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:105 [2021-07-09 18:44:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:27,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388371502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:27,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:27,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:44:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301766817] [2021-07-09 18:44:27,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:27,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:27,701 INFO L87 Difference]: Start difference. First operand 1419 states and 4817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-09 18:44:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:29,635 INFO L93 Difference]: Finished difference Result 2315 states and 7376 transitions. [2021-07-09 18:44:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:44:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:29,639 INFO L225 Difference]: With dead ends: 2315 [2021-07-09 18:44:29,639 INFO L226 Difference]: Without dead ends: 2281 [2021-07-09 18:44:29,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1763.2ms TimeCoverageRelationStatistics Valid=399, Invalid=1953, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:44:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-07-09 18:44:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1435. [2021-07-09 18:44:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.406555090655509) internal successors, (4885), 1434 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4885 transitions. [2021-07-09 18:44:29,662 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4885 transitions. Word has length 26 [2021-07-09 18:44:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:29,662 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4885 transitions. [2021-07-09 18:44:29,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-09 18:44:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4885 transitions. [2021-07-09 18:44:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:29,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:29,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:29,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:29,877 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:29,877 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 27 times [2021-07-09 18:44:29,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:29,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226440664] [2021-07-09 18:44:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:30,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:30,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226440664] [2021-07-09 18:44:30,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226440664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:30,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252783753] [2021-07-09 18:44:30,037 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 [2021-07-09 18:44:30,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:44:30,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:30,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:44:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:30,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:30,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:44:30,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:30,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:30,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:44:30,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:65 [2021-07-09 18:44:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:30,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252783753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:30,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:30,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:44:30,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182766350] [2021-07-09 18:44:30,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:30,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:30,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:30,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:30,293 INFO L87 Difference]: Start difference. First operand 1435 states and 4885 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:31,508 INFO L93 Difference]: Finished difference Result 2365 states and 7650 transitions. [2021-07-09 18:44:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:44:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:31,512 INFO L225 Difference]: With dead ends: 2365 [2021-07-09 18:44:31,512 INFO L226 Difference]: Without dead ends: 2346 [2021-07-09 18:44:31,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 909.7ms TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:44:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-09 18:44:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1429. [2021-07-09 18:44:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.40406162464986) internal successors, (4861), 1428 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4861 transitions. [2021-07-09 18:44:31,536 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4861 transitions. Word has length 26 [2021-07-09 18:44:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:31,536 INFO L482 AbstractCegarLoop]: Abstraction has 1429 states and 4861 transitions. [2021-07-09 18:44:31,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4861 transitions. [2021-07-09 18:44:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:31,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:31,538 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] [2021-07-09 18:44:31,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:31,754 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:31,755 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-07-09 18:44:31,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:31,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327847301] [2021-07-09 18:44:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:31,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327847301] [2021-07-09 18:44:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327847301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784900054] [2021-07-09 18:44:31,930 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 [2021-07-09 18:44:31,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:32,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:44:32,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:32,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:32,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:32,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:44:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:32,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784900054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:32,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:32,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 18:44:32,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185832012] [2021-07-09 18:44:32,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:32,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:32,102 INFO L87 Difference]: Start difference. First operand 1429 states and 4861 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:44:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:33,596 INFO L93 Difference]: Finished difference Result 3028 states and 9674 transitions. [2021-07-09 18:44:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:44:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:33,602 INFO L225 Difference]: With dead ends: 3028 [2021-07-09 18:44:33,602 INFO L226 Difference]: Without dead ends: 2992 [2021-07-09 18:44:33,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1187.0ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:44:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-07-09 18:44:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1562. [2021-07-09 18:44:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.42152466367713) internal successors, (5341), 1561 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5341 transitions. [2021-07-09 18:44:33,643 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5341 transitions. Word has length 26 [2021-07-09 18:44:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:33,643 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 5341 transitions. [2021-07-09 18:44:33,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:44:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5341 transitions. [2021-07-09 18:44:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:33,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:33,645 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] [2021-07-09 18:44:33,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:33,862 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-07-09 18:44:33,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:33,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817062571] [2021-07-09 18:44:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:34,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:34,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817062571] [2021-07-09 18:44:34,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817062571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720689195] [2021-07-09 18:44:34,072 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 [2021-07-09 18:44:34,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:44:34,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:34,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:44:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:34,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:34,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:34,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:34,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-09 18:44:34,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:34,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:34,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:34,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:44:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:34,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720689195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:34,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:34,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 18:44:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361232072] [2021-07-09 18:44:34,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:34,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:34,273 INFO L87 Difference]: Start difference. First operand 1562 states and 5341 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:44:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:35,966 INFO L93 Difference]: Finished difference Result 3412 states and 10776 transitions. [2021-07-09 18:44:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:44:35,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:35,973 INFO L225 Difference]: With dead ends: 3412 [2021-07-09 18:44:35,973 INFO L226 Difference]: Without dead ends: 3355 [2021-07-09 18:44:35,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1411.6ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:44:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-07-09 18:44:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1585. [2021-07-09 18:44:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.4242424242424243) internal successors, (5424), 1584 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5424 transitions. [2021-07-09 18:44:36,011 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5424 transitions. Word has length 26 [2021-07-09 18:44:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:36,011 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5424 transitions. [2021-07-09 18:44:36,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-09 18:44:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5424 transitions. [2021-07-09 18:44:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:36,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:36,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:36,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 18:44:36,229 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:36,229 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 28 times [2021-07-09 18:44:36,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:36,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290647911] [2021-07-09 18:44:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:36,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:36,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290647911] [2021-07-09 18:44:36,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290647911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:36,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629302534] [2021-07-09 18:44:36,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:36,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:36,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:44:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:36,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:36,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:44:36,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:36,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:36,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:36,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:44:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:36,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629302534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:36,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:36,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:44:36,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726136228] [2021-07-09 18:44:36,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:36,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:36,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:36,578 INFO L87 Difference]: Start difference. First operand 1585 states and 5424 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:44:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:37,286 INFO L93 Difference]: Finished difference Result 2011 states and 6730 transitions. [2021-07-09 18:44:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:44:37,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:37,291 INFO L225 Difference]: With dead ends: 2011 [2021-07-09 18:44:37,291 INFO L226 Difference]: Without dead ends: 1996 [2021-07-09 18:44:37,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:44:37,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-07-09 18:44:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1593. [2021-07-09 18:44:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.423994974874372) internal successors, (5451), 1592 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5451 transitions. [2021-07-09 18:44:37,316 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5451 transitions. Word has length 26 [2021-07-09 18:44:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:37,317 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5451 transitions. [2021-07-09 18:44:37,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-09 18:44:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5451 transitions. [2021-07-09 18:44:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:37,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:37,320 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:37,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-09 18:44:37,536 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:37,537 INFO L82 PathProgramCache]: Analyzing trace with hash -916076553, now seen corresponding path program 29 times [2021-07-09 18:44:37,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:37,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225352349] [2021-07-09 18:44:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:37,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:37,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225352349] [2021-07-09 18:44:37,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225352349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545077533] [2021-07-09 18:44:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:37,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:44:37,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:44:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:37,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:37,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:44:37,884 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:44:37,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:37,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:37,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:44:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:37,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545077533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:37,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:37,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:44:37,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376176892] [2021-07-09 18:44:37,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:37,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:37,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:37,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:37,937 INFO L87 Difference]: Start difference. First operand 1593 states and 5451 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-07-09 18:44:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:38,863 INFO L93 Difference]: Finished difference Result 2467 states and 8081 transitions. [2021-07-09 18:44:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:44:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:38,868 INFO L225 Difference]: With dead ends: 2467 [2021-07-09 18:44:38,868 INFO L226 Difference]: Without dead ends: 2448 [2021-07-09 18:44:38,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:44:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-07-09 18:44:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1588. [2021-07-09 18:44:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.421550094517958) internal successors, (5430), 1587 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5430 transitions. [2021-07-09 18:44:38,894 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5430 transitions. Word has length 26 [2021-07-09 18:44:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:38,894 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5430 transitions. [2021-07-09 18:44:38,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-07-09 18:44:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5430 transitions. [2021-07-09 18:44:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:38,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:38,896 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:39,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 18:44:39,112 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:39,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 30 times [2021-07-09 18:44:39,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:39,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022659028] [2021-07-09 18:44:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:39,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:39,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022659028] [2021-07-09 18:44:39,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022659028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:39,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316587807] [2021-07-09 18:44:39,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:39,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:39,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:44:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:39,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:39,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:44:39,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:39,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:39,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:39,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:89 [2021-07-09 18:44:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316587807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:39,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:39,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:44:39,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432822447] [2021-07-09 18:44:39,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:39,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:39,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:39,513 INFO L87 Difference]: Start difference. First operand 1588 states and 5430 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-09 18:44:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:41,188 INFO L93 Difference]: Finished difference Result 2521 states and 8150 transitions. [2021-07-09 18:44:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:44:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:41,193 INFO L225 Difference]: With dead ends: 2521 [2021-07-09 18:44:41,193 INFO L226 Difference]: Without dead ends: 2452 [2021-07-09 18:44:41,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1408.0ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:44:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-07-09 18:44:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1576. [2021-07-09 18:44:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.420952380952381) internal successors, (5388), 1575 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5388 transitions. [2021-07-09 18:44:41,219 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5388 transitions. Word has length 26 [2021-07-09 18:44:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:41,219 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5388 transitions. [2021-07-09 18:44:41,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-09 18:44:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5388 transitions. [2021-07-09 18:44:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:41,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:41,222 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] [2021-07-09 18:44:41,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 18:44:41,438 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:41,438 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-07-09 18:44:41,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:41,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401912874] [2021-07-09 18:44:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:41,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:41,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401912874] [2021-07-09 18:44:41,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401912874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:41,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874468279] [2021-07-09 18:44:41,690 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:41,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:44:41,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:41,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:41,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:41,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:44:41,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:41,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:41,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:41,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:44:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:41,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874468279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:41,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:41,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:44:41,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25619117] [2021-07-09 18:44:41,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:41,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:41,883 INFO L87 Difference]: Start difference. First operand 1576 states and 5388 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:42,835 INFO L93 Difference]: Finished difference Result 2032 states and 6722 transitions. [2021-07-09 18:44:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:44:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:42,839 INFO L225 Difference]: With dead ends: 2032 [2021-07-09 18:44:42,839 INFO L226 Difference]: Without dead ends: 2010 [2021-07-09 18:44:42,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 821.8ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-07-09 18:44:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1568. [2021-07-09 18:44:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-07-09 18:44:42,862 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-07-09 18:44:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:42,862 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-07-09 18:44:42,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-07-09 18:44:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:42,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:42,864 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] [2021-07-09 18:44:43,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-09 18:44:43,081 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-07-09 18:44:43,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:43,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036390696] [2021-07-09 18:44:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:43,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:43,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036390696] [2021-07-09 18:44:43,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036390696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:43,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838380285] [2021-07-09 18:44:43,348 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:43,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:43,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:43,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:43,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:44:43,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:43,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:44:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:43,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838380285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:43,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:43,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:44:43,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870027703] [2021-07-09 18:44:43,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:43,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:43,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:43,514 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:44,779 INFO L93 Difference]: Finished difference Result 2234 states and 7397 transitions. [2021-07-09 18:44:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:44:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:44,783 INFO L225 Difference]: With dead ends: 2234 [2021-07-09 18:44:44,783 INFO L226 Difference]: Without dead ends: 2219 [2021-07-09 18:44:44,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1162.9ms TimeCoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:44:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-07-09 18:44:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1568. [2021-07-09 18:44:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-07-09 18:44:44,807 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-07-09 18:44:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:44,807 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-07-09 18:44:44,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-07-09 18:44:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:44,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:44,809 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] [2021-07-09 18:44:45,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-09 18:44:45,011 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-07-09 18:44:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:45,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304568113] [2021-07-09 18:44:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:45,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:45,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304568113] [2021-07-09 18:44:45,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304568113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:45,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491972252] [2021-07-09 18:44:45,238 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:45,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:45,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 18:44:45,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:45,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:45,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:45,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-09 18:44:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491972252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:45,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:45,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-07-09 18:44:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378584065] [2021-07-09 18:44:45,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:44:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:44:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:44:45,447 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:47,182 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-07-09 18:44:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:49,213 INFO L93 Difference]: Finished difference Result 2979 states and 9505 transitions. [2021-07-09 18:44:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:44:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:49,218 INFO L225 Difference]: With dead ends: 2979 [2021-07-09 18:44:49,218 INFO L226 Difference]: Without dead ends: 2932 [2021-07-09 18:44:49,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 3029.3ms TimeCoverageRelationStatistics Valid=1084, Invalid=6056, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:44:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-07-09 18:44:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1584. [2021-07-09 18:44:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.4112444725205306) internal successors, (5400), 1583 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5400 transitions. [2021-07-09 18:44:49,249 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5400 transitions. Word has length 26 [2021-07-09 18:44:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:49,249 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5400 transitions. [2021-07-09 18:44:49,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5400 transitions. [2021-07-09 18:44:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:49,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:49,252 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] [2021-07-09 18:44:49,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-09 18:44:49,460 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-07-09 18:44:49,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:49,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897200784] [2021-07-09 18:44:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:49,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897200784] [2021-07-09 18:44:49,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897200784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927703790] [2021-07-09 18:44:49,681 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:49,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:44:49,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:49,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:44:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:49,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:49,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-07-09 18:44:49,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:50,058 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-09 18:44:50,059 INFO L628 ElimStorePlain]: treesize reduction 66, result has 54.8 percent of original size [2021-07-09 18:44:50,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:50,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:214 [2021-07-09 18:44:50,216 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-09 18:44:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:50,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927703790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:50,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:50,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:44:50,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909217759] [2021-07-09 18:44:50,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:44:50,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:50,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:44:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:44:50,401 INFO L87 Difference]: Start difference. First operand 1584 states and 5400 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:51,792 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 18:44:52,156 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 18:44:52,350 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-09 18:44:52,654 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-07-09 18:44:52,881 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-09 18:44:53,026 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2021-07-09 18:44:53,314 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-07-09 18:44:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:53,383 INFO L93 Difference]: Finished difference Result 2665 states and 8672 transitions. [2021-07-09 18:44:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:44:53,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:53,388 INFO L225 Difference]: With dead ends: 2665 [2021-07-09 18:44:53,388 INFO L226 Difference]: Without dead ends: 2635 [2021-07-09 18:44:53,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2840.7ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:44:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-07-09 18:44:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1595. [2021-07-09 18:44:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.417189460476788) internal successors, (5447), 1594 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5447 transitions. [2021-07-09 18:44:53,422 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5447 transitions. Word has length 26 [2021-07-09 18:44:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:53,422 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5447 transitions. [2021-07-09 18:44:53,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5447 transitions. [2021-07-09 18:44:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:53,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:53,424 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] [2021-07-09 18:44:53,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:53,642 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-07-09 18:44:53,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:53,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886715825] [2021-07-09 18:44:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:53,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886715825] [2021-07-09 18:44:53,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886715825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405015302] [2021-07-09 18:44:53,917 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:53,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:53,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:54,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:44:54,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:54,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:54,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:54,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:44:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:54,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405015302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:54,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:54,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:44:54,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443335273] [2021-07-09 18:44:54,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:54,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:54,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:54,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:54,138 INFO L87 Difference]: Start difference. First operand 1595 states and 5447 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:55,627 INFO L93 Difference]: Finished difference Result 2141 states and 7071 transitions. [2021-07-09 18:44:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:44:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:55,631 INFO L225 Difference]: With dead ends: 2141 [2021-07-09 18:44:55,632 INFO L226 Difference]: Without dead ends: 2126 [2021-07-09 18:44:55,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1266.5ms TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:44:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-07-09 18:44:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1599. [2021-07-09 18:44:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-07-09 18:44:55,658 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-07-09 18:44:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:55,658 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-07-09 18:44:55,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-07-09 18:44:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:55,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:55,660 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] [2021-07-09 18:44:55,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-09 18:44:55,877 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-07-09 18:44:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:55,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732965092] [2021-07-09 18:44:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:56,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732965092] [2021-07-09 18:44:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732965092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656160441] [2021-07-09 18:44:56,113 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:56,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:44:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:44:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:56,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:56,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:56,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:56,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-09 18:44:56,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:56,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:56,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:56,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-07-09 18:44:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:56,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656160441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:56,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:56,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:44:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962953131] [2021-07-09 18:44:56,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:44:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:56,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:44:56,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:44:56,410 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:57,460 INFO L93 Difference]: Finished difference Result 2310 states and 7701 transitions. [2021-07-09 18:44:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:44:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:44:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:57,465 INFO L225 Difference]: With dead ends: 2310 [2021-07-09 18:44:57,465 INFO L226 Difference]: Without dead ends: 2295 [2021-07-09 18:44:57,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 959.1ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-09 18:44:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1599. [2021-07-09 18:44:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-07-09 18:44:57,491 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-07-09 18:44:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:57,491 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-07-09 18:44:57,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-07-09 18:44:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:44:57,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:57,494 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] [2021-07-09 18:44:57,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-09 18:44:57,709 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-07-09 18:44:57,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:57,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145000309] [2021-07-09 18:44:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:57,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:57,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145000309] [2021-07-09 18:44:57,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145000309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:57,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023445126] [2021-07-09 18:44:57,933 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:57,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:44:57,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:57,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:44:57,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:58,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:58,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:58,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:44:58,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:44:58,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:58,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:58,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-07-09 18:44:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:58,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023445126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:58,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:58,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:44:58,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112639254] [2021-07-09 18:44:58,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:44:58,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:44:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:44:58,119 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:00,285 INFO L93 Difference]: Finished difference Result 2882 states and 9198 transitions. [2021-07-09 18:45:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:45:00,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:00,291 INFO L225 Difference]: With dead ends: 2882 [2021-07-09 18:45:00,291 INFO L226 Difference]: Without dead ends: 2848 [2021-07-09 18:45:00,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2007.5ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:45:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-07-09 18:45:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1599. [2021-07-09 18:45:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4198998748435545) internal successors, (5465), 1598 states have internal predecessors, (5465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5465 transitions. [2021-07-09 18:45:00,325 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5465 transitions. Word has length 26 [2021-07-09 18:45:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:00,326 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5465 transitions. [2021-07-09 18:45:00,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5465 transitions. [2021-07-09 18:45:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:00,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:00,328 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:00,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 18:45:00,530 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:00,530 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 31 times [2021-07-09 18:45:00,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:00,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126509362] [2021-07-09 18:45:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:00,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126509362] [2021-07-09 18:45:00,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126509362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312474265] [2021-07-09 18:45:00,704 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:00,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:45:00,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:00,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:00,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:00,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:00,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:00,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:00,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:45:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:00,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312474265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:00,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:00,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:00,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310087444] [2021-07-09 18:45:00,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:00,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:00,910 INFO L87 Difference]: Start difference. First operand 1599 states and 5465 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:01,948 INFO L93 Difference]: Finished difference Result 2462 states and 8155 transitions. [2021-07-09 18:45:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:45:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:01,953 INFO L225 Difference]: With dead ends: 2462 [2021-07-09 18:45:01,953 INFO L226 Difference]: Without dead ends: 2447 [2021-07-09 18:45:01,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:45:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-09 18:45:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1590. [2021-07-09 18:45:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.416614222781624) internal successors, (5429), 1589 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5429 transitions. [2021-07-09 18:45:01,978 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5429 transitions. Word has length 26 [2021-07-09 18:45:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:01,978 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5429 transitions. [2021-07-09 18:45:01,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5429 transitions. [2021-07-09 18:45:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:01,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:01,980 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:02,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:02,196 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash -107626611, now seen corresponding path program 32 times [2021-07-09 18:45:02,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:02,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652917863] [2021-07-09 18:45:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:02,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652917863] [2021-07-09 18:45:02,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652917863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913087990] [2021-07-09 18:45:02,430 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:02,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:02,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:02,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-09 18:45:02,585 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:02,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:02,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:02,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-07-09 18:45:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913087990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:02,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:02,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445388720] [2021-07-09 18:45:02,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:02,627 INFO L87 Difference]: Start difference. First operand 1590 states and 5429 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:03,664 INFO L93 Difference]: Finished difference Result 2279 states and 7572 transitions. [2021-07-09 18:45:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:45:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:03,668 INFO L225 Difference]: With dead ends: 2279 [2021-07-09 18:45:03,669 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 18:45:03,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 954.8ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 18:45:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1583. [2021-07-09 18:45:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4140328697850824) internal successors, (5401), 1582 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5401 transitions. [2021-07-09 18:45:03,723 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5401 transitions. Word has length 26 [2021-07-09 18:45:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:03,723 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5401 transitions. [2021-07-09 18:45:03,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5401 transitions. [2021-07-09 18:45:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:03,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:03,725 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:03,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:03,942 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:03,942 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-07-09 18:45:03,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:03,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928506310] [2021-07-09 18:45:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:04,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928506310] [2021-07-09 18:45:04,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928506310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213365682] [2021-07-09 18:45:04,103 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:04,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:04,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:04,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:04,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:04,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:04,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:04,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-07-09 18:45:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:04,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213365682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:04,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:04,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:45:04,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180247279] [2021-07-09 18:45:04,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:04,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:04,290 INFO L87 Difference]: Start difference. First operand 1583 states and 5401 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:04,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:04,688 INFO L93 Difference]: Finished difference Result 2090 states and 6923 transitions. [2021-07-09 18:45:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:45:04,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:04,692 INFO L225 Difference]: With dead ends: 2090 [2021-07-09 18:45:04,692 INFO L226 Difference]: Without dead ends: 2069 [2021-07-09 18:45:04,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:45:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-07-09 18:45:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1559. [2021-07-09 18:45:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.4127086007702183) internal successors, (5317), 1558 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5317 transitions. [2021-07-09 18:45:04,718 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5317 transitions. Word has length 26 [2021-07-09 18:45:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:04,719 INFO L482 AbstractCegarLoop]: Abstraction has 1559 states and 5317 transitions. [2021-07-09 18:45:04,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5317 transitions. [2021-07-09 18:45:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:04,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:04,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:04,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:04,937 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash -550251037, now seen corresponding path program 34 times [2021-07-09 18:45:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:04,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548422333] [2021-07-09 18:45:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:05,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548422333] [2021-07-09 18:45:05,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548422333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846297030] [2021-07-09 18:45:05,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:05,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:05,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:05,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:05,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:05,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:05,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:05,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:05,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:05,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:45:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:05,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846297030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:05,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:05,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:45:05,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990570237] [2021-07-09 18:45:05,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:05,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:05,298 INFO L87 Difference]: Start difference. First operand 1559 states and 5317 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:05,777 INFO L93 Difference]: Finished difference Result 2051 states and 6824 transitions. [2021-07-09 18:45:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:45:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:05,781 INFO L225 Difference]: With dead ends: 2051 [2021-07-09 18:45:05,781 INFO L226 Difference]: Without dead ends: 2036 [2021-07-09 18:45:05,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:45:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-07-09 18:45:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1558. [2021-07-09 18:45:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.41233140655106) internal successors, (5313), 1557 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5313 transitions. [2021-07-09 18:45:05,802 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5313 transitions. Word has length 26 [2021-07-09 18:45:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:05,802 INFO L482 AbstractCegarLoop]: Abstraction has 1558 states and 5313 transitions. [2021-07-09 18:45:05,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5313 transitions. [2021-07-09 18:45:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:05,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:05,804 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:06,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:06,020 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2127183479, now seen corresponding path program 35 times [2021-07-09 18:45:06,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:06,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620981206] [2021-07-09 18:45:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:06,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620981206] [2021-07-09 18:45:06,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620981206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716014345] [2021-07-09 18:45:06,134 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:06,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:06,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:06,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:06,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:06,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:06,261 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:06,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:06,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:06,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:45:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716014345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:06,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:06,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:45:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598745431] [2021-07-09 18:45:06,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:06,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:06,294 INFO L87 Difference]: Start difference. First operand 1558 states and 5313 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-07-09 18:45:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:06,823 INFO L93 Difference]: Finished difference Result 2353 states and 7772 transitions. [2021-07-09 18:45:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:45:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:06,827 INFO L225 Difference]: With dead ends: 2353 [2021-07-09 18:45:06,827 INFO L226 Difference]: Without dead ends: 2334 [2021-07-09 18:45:06,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:45:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-07-09 18:45:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1541. [2021-07-09 18:45:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.4103896103896103) internal successors, (5252), 1540 states have internal predecessors, (5252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5252 transitions. [2021-07-09 18:45:06,852 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5252 transitions. Word has length 26 [2021-07-09 18:45:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:06,852 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 5252 transitions. [2021-07-09 18:45:06,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-07-09 18:45:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5252 transitions. [2021-07-09 18:45:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:06,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:06,854 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:07,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:07,070 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:07,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 36 times [2021-07-09 18:45:07,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:07,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163105317] [2021-07-09 18:45:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:07,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:07,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163105317] [2021-07-09 18:45:07,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163105317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:07,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499285460] [2021-07-09 18:45:07,162 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:07,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:07,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:07,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:07,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:07,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:07,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:45:07,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:45:07,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:07,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:07,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-09 18:45:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:07,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499285460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:07,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:07,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:45:07,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202859514] [2021-07-09 18:45:07,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:07,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:07,364 INFO L87 Difference]: Start difference. First operand 1541 states and 5252 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:07,823 INFO L93 Difference]: Finished difference Result 2055 states and 6840 transitions. [2021-07-09 18:45:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:45:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:07,827 INFO L225 Difference]: With dead ends: 2055 [2021-07-09 18:45:07,827 INFO L226 Difference]: Without dead ends: 2040 [2021-07-09 18:45:07,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:45:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-09 18:45:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1586. [2021-07-09 18:45:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.404416403785489) internal successors, (5396), 1585 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5396 transitions. [2021-07-09 18:45:07,853 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5396 transitions. Word has length 26 [2021-07-09 18:45:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:07,854 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5396 transitions. [2021-07-09 18:45:07,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5396 transitions. [2021-07-09 18:45:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:07,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:07,856 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:08,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-09 18:45:08,072 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:08,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 37 times [2021-07-09 18:45:08,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:08,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713032384] [2021-07-09 18:45:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:08,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:08,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713032384] [2021-07-09 18:45:08,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713032384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:08,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665841285] [2021-07-09 18:45:08,203 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:45:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:08,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:08,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:08,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:08,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:08,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:08,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:45:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:08,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665841285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:08,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:08,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:08,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98313243] [2021-07-09 18:45:08,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:08,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:08,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:08,383 INFO L87 Difference]: Start difference. First operand 1586 states and 5396 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:09,011 INFO L93 Difference]: Finished difference Result 2330 states and 7681 transitions. [2021-07-09 18:45:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:45:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:09,016 INFO L225 Difference]: With dead ends: 2330 [2021-07-09 18:45:09,016 INFO L226 Difference]: Without dead ends: 2315 [2021-07-09 18:45:09,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:45:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-07-09 18:45:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1587. [2021-07-09 18:45:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.4060529634300125) internal successors, (5402), 1586 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5402 transitions. [2021-07-09 18:45:09,063 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5402 transitions. Word has length 26 [2021-07-09 18:45:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:09,063 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5402 transitions. [2021-07-09 18:45:09,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5402 transitions. [2021-07-09 18:45:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:09,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:09,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:09,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-07-09 18:45:09,269 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 38 times [2021-07-09 18:45:09,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:09,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901961242] [2021-07-09 18:45:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:09,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901961242] [2021-07-09 18:45:09,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901961242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492113871] [2021-07-09 18:45:09,393 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:09,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:09,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:09,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:09,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:09,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:45:09,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:09,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:09,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:09,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-07-09 18:45:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:09,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492113871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:09,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:09,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 18:45:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914067652] [2021-07-09 18:45:09,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:45:09,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:09,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:45:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:45:09,598 INFO L87 Difference]: Start difference. First operand 1587 states and 5402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-09 18:45:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:09,950 INFO L93 Difference]: Finished difference Result 2103 states and 7017 transitions. [2021-07-09 18:45:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:45:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:09,954 INFO L225 Difference]: With dead ends: 2103 [2021-07-09 18:45:09,955 INFO L226 Difference]: Without dead ends: 2088 [2021-07-09 18:45:09,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:45:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-07-09 18:45:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1590. [2021-07-09 18:45:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.409691629955947) internal successors, (5418), 1589 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5418 transitions. [2021-07-09 18:45:09,979 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5418 transitions. Word has length 26 [2021-07-09 18:45:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:09,988 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5418 transitions. [2021-07-09 18:45:09,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-09 18:45:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5418 transitions. [2021-07-09 18:45:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:09,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:09,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:10,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-09 18:45:10,203 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 39 times [2021-07-09 18:45:10,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:10,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679858858] [2021-07-09 18:45:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:10,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:10,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679858858] [2021-07-09 18:45:10,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679858858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:10,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143324924] [2021-07-09 18:45:10,330 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:10,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:10,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:10,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:10,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:10,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:10,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:45:10,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:10,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:10,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:10,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-07-09 18:45:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:10,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143324924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:10,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:10,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 18:45:10,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087339031] [2021-07-09 18:45:10,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:45:10,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:45:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:45:10,552 INFO L87 Difference]: Start difference. First operand 1590 states and 5418 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:10,902 INFO L93 Difference]: Finished difference Result 2135 states and 7120 transitions. [2021-07-09 18:45:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:45:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:10,922 INFO L225 Difference]: With dead ends: 2135 [2021-07-09 18:45:10,922 INFO L226 Difference]: Without dead ends: 2120 [2021-07-09 18:45:10,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 381.6ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:45:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-07-09 18:45:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1608. [2021-07-09 18:45:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.4051026757934038) internal successors, (5472), 1607 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5472 transitions. [2021-07-09 18:45:10,943 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5472 transitions. Word has length 26 [2021-07-09 18:45:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:10,943 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5472 transitions. [2021-07-09 18:45:10,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5472 transitions. [2021-07-09 18:45:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:10,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:10,945 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:11,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:11,157 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:11,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:11,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 40 times [2021-07-09 18:45:11,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:11,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183574911] [2021-07-09 18:45:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:11,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:11,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183574911] [2021-07-09 18:45:11,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183574911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:11,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091634931] [2021-07-09 18:45:11,282 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:11,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:11,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:11,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:11,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:11,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:11,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:11,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:11,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:45:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:11,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091634931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:11,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:11,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:45:11,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859274634] [2021-07-09 18:45:11,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:11,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:11,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:11,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:11,462 INFO L87 Difference]: Start difference. First operand 1608 states and 5472 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:11,908 INFO L93 Difference]: Finished difference Result 2064 states and 6890 transitions. [2021-07-09 18:45:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:45:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:11,912 INFO L225 Difference]: With dead ends: 2064 [2021-07-09 18:45:11,912 INFO L226 Difference]: Without dead ends: 2049 [2021-07-09 18:45:11,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:45:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-09 18:45:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1629. [2021-07-09 18:45:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.401105651105651) internal successors, (5537), 1628 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5537 transitions. [2021-07-09 18:45:11,936 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5537 transitions. Word has length 26 [2021-07-09 18:45:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:11,936 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5537 transitions. [2021-07-09 18:45:11,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5537 transitions. [2021-07-09 18:45:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:11,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:11,939 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:12,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:12,159 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:12,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 41 times [2021-07-09 18:45:12,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:12,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750838142] [2021-07-09 18:45:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:12,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:12,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750838142] [2021-07-09 18:45:12,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750838142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:12,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208871778] [2021-07-09 18:45:12,294 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:12,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:12,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:12,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:12,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:12,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:12,439 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:12,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:12,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:12,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:45:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:12,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208871778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:12,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:12,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:45:12,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734323236] [2021-07-09 18:45:12,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:12,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:12,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:12,482 INFO L87 Difference]: Start difference. First operand 1629 states and 5537 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-07-09 18:45:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:13,022 INFO L93 Difference]: Finished difference Result 2357 states and 7803 transitions. [2021-07-09 18:45:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:45:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:13,027 INFO L225 Difference]: With dead ends: 2357 [2021-07-09 18:45:13,027 INFO L226 Difference]: Without dead ends: 2342 [2021-07-09 18:45:13,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:45:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-07-09 18:45:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1626. [2021-07-09 18:45:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.4024615384615386) internal successors, (5529), 1625 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5529 transitions. [2021-07-09 18:45:13,055 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5529 transitions. Word has length 26 [2021-07-09 18:45:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:13,055 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5529 transitions. [2021-07-09 18:45:13,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-07-09 18:45:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5529 transitions. [2021-07-09 18:45:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:13,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:13,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:13,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:13,281 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 42 times [2021-07-09 18:45:13,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:13,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500025338] [2021-07-09 18:45:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:13,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500025338] [2021-07-09 18:45:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500025338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596798256] [2021-07-09 18:45:13,397 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:13,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:45:13,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:13,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:13,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:13,523 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:13,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:13,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:13,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:45:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:13,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596798256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:13,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:13,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:13,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515814515] [2021-07-09 18:45:13,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:13,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:13,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:13,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:13,563 INFO L87 Difference]: Start difference. First operand 1626 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:14,053 INFO L93 Difference]: Finished difference Result 2213 states and 7343 transitions. [2021-07-09 18:45:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:45:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:14,057 INFO L225 Difference]: With dead ends: 2213 [2021-07-09 18:45:14,057 INFO L226 Difference]: Without dead ends: 2188 [2021-07-09 18:45:14,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:45:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-07-09 18:45:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1626. [2021-07-09 18:45:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-07-09 18:45:14,080 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-07-09 18:45:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:14,080 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-07-09 18:45:14,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-07-09 18:45:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:14,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:14,083 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:14,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:14,299 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 43 times [2021-07-09 18:45:14,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:14,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232775756] [2021-07-09 18:45:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:14,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232775756] [2021-07-09 18:45:14,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232775756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446177237] [2021-07-09 18:45:14,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:14,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:14,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:14,579 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:14,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:14,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:14,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:45:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446177237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:14,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:14,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:45:14,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295503204] [2021-07-09 18:45:14,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:14,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:14,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:14,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:14,624 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:14,961 INFO L93 Difference]: Finished difference Result 2137 states and 7136 transitions. [2021-07-09 18:45:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:45:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:14,964 INFO L225 Difference]: With dead ends: 2137 [2021-07-09 18:45:14,965 INFO L226 Difference]: Without dead ends: 2122 [2021-07-09 18:45:14,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:45:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-09 18:45:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1626. [2021-07-09 18:45:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-07-09 18:45:14,987 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-07-09 18:45:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:14,987 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-07-09 18:45:14,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-07-09 18:45:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:14,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:14,990 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] [2021-07-09 18:45:15,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:15,207 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1743994595, now seen corresponding path program 55 times [2021-07-09 18:45:15,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:15,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093758063] [2021-07-09 18:45:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:15,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:15,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093758063] [2021-07-09 18:45:15,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093758063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:15,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382918533] [2021-07-09 18:45:15,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:15,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:15,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:15,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:15,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:15,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:15,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:15,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:15,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:15,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:15,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:15,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382918533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:15,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:15,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-09 18:45:15,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540329296] [2021-07-09 18:45:15,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:15,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:15,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:15,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:15,523 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:15,820 INFO L93 Difference]: Finished difference Result 2071 states and 6841 transitions. [2021-07-09 18:45:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:45:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:15,824 INFO L225 Difference]: With dead ends: 2071 [2021-07-09 18:45:15,824 INFO L226 Difference]: Without dead ends: 2045 [2021-07-09 18:45:15,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:45:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-07-09 18:45:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1620. [2021-07-09 18:45:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4033353922174183) internal successors, (5510), 1619 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5510 transitions. [2021-07-09 18:45:15,850 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5510 transitions. Word has length 26 [2021-07-09 18:45:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:15,851 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5510 transitions. [2021-07-09 18:45:15,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5510 transitions. [2021-07-09 18:45:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:15,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:15,853 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] [2021-07-09 18:45:16,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:16,059 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash 469684583, now seen corresponding path program 56 times [2021-07-09 18:45:16,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:16,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855359748] [2021-07-09 18:45:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:16,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:16,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855359748] [2021-07-09 18:45:16,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855359748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:16,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422627906] [2021-07-09 18:45:16,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:16,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:16,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:16,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:16,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:16,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:16,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:16,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:16,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:16,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:16,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:16,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422627906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:16,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:16,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-09 18:45:16,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740427142] [2021-07-09 18:45:16,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:16,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:16,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:16,361 INFO L87 Difference]: Start difference. First operand 1620 states and 5510 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-07-09 18:45:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:16,913 INFO L93 Difference]: Finished difference Result 2277 states and 7481 transitions. [2021-07-09 18:45:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:45:16,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:16,918 INFO L225 Difference]: With dead ends: 2277 [2021-07-09 18:45:16,918 INFO L226 Difference]: Without dead ends: 2262 [2021-07-09 18:45:16,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:45:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-07-09 18:45:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1610. [2021-07-09 18:45:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.403977625854568) internal successors, (5477), 1609 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5477 transitions. [2021-07-09 18:45:16,946 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5477 transitions. Word has length 26 [2021-07-09 18:45:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:16,946 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5477 transitions. [2021-07-09 18:45:16,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-07-09 18:45:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5477 transitions. [2021-07-09 18:45:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:16,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:16,948 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] [2021-07-09 18:45:17,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-09 18:45:17,162 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 57 times [2021-07-09 18:45:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:17,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787387508] [2021-07-09 18:45:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:17,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:17,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787387508] [2021-07-09 18:45:17,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787387508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:17,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585235491] [2021-07-09 18:45:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:17,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:17,482 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-09 18:45:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-07-09 18:45:17,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:17,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:17,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:17,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-07-09 18:45:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:17,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585235491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:17,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:17,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358291136] [2021-07-09 18:45:17,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:17,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:17,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:17,503 INFO L87 Difference]: Start difference. First operand 1610 states and 5477 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:18,325 INFO L93 Difference]: Finished difference Result 2271 states and 7307 transitions. [2021-07-09 18:45:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:45:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:18,329 INFO L225 Difference]: With dead ends: 2271 [2021-07-09 18:45:18,329 INFO L226 Difference]: Without dead ends: 2241 [2021-07-09 18:45:18,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 641.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-07-09 18:45:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1631. [2021-07-09 18:45:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-07-09 18:45:18,354 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-07-09 18:45:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:18,354 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-07-09 18:45:18,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-07-09 18:45:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:18,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:18,377 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] [2021-07-09 18:45:18,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 18:45:18,597 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1778959663, now seen corresponding path program 58 times [2021-07-09 18:45:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:18,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478598146] [2021-07-09 18:45:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:18,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:18,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478598146] [2021-07-09 18:45:18,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478598146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:18,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782169237] [2021-07-09 18:45:18,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:18,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:18,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:18,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:18,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:18,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:18,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:18,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:18,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:45:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:18,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782169237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:18,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:18,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-09 18:45:18,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234282507] [2021-07-09 18:45:18,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:18,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:18,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:18,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:18,906 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:19,335 INFO L93 Difference]: Finished difference Result 2135 states and 7023 transitions. [2021-07-09 18:45:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:45:19,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:19,339 INFO L225 Difference]: With dead ends: 2135 [2021-07-09 18:45:19,340 INFO L226 Difference]: Without dead ends: 2113 [2021-07-09 18:45:19,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:45:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-07-09 18:45:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1631. [2021-07-09 18:45:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-07-09 18:45:19,370 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-07-09 18:45:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:19,370 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-07-09 18:45:19,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-07-09 18:45:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:19,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:19,373 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] [2021-07-09 18:45:19,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-09 18:45:19,576 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 59 times [2021-07-09 18:45:19,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:19,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4349823] [2021-07-09 18:45:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:19,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:19,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4349823] [2021-07-09 18:45:19,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4349823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:19,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425993301] [2021-07-09 18:45:19,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:45:19,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:19,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:19,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:19,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:19,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:19,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:19,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:45:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:19,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425993301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:19,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:19,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:45:19,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365155732] [2021-07-09 18:45:19,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:19,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:19,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:19,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:19,911 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:20,259 INFO L93 Difference]: Finished difference Result 2023 states and 6745 transitions. [2021-07-09 18:45:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:45:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:20,262 INFO L225 Difference]: With dead ends: 2023 [2021-07-09 18:45:20,262 INFO L226 Difference]: Without dead ends: 1992 [2021-07-09 18:45:20,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:45:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-09 18:45:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1637. [2021-07-09 18:45:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-07-09 18:45:20,284 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-07-09 18:45:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:20,284 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-07-09 18:45:20,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-07-09 18:45:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:20,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:20,286 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] [2021-07-09 18:45:20,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:20,492 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 60 times [2021-07-09 18:45:20,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:20,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870373905] [2021-07-09 18:45:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:20,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:20,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870373905] [2021-07-09 18:45:20,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870373905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:20,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483311302] [2021-07-09 18:45:20,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:20,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:20,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:20,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:45:20,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:20,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:20,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:20,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:45:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:20,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483311302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:20,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:20,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-09 18:45:20,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292792770] [2021-07-09 18:45:20,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:20,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:20,797 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:21,137 INFO L93 Difference]: Finished difference Result 2057 states and 6834 transitions. [2021-07-09 18:45:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:45:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:21,141 INFO L225 Difference]: With dead ends: 2057 [2021-07-09 18:45:21,142 INFO L226 Difference]: Without dead ends: 2042 [2021-07-09 18:45:21,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:45:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-07-09 18:45:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1637. [2021-07-09 18:45:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-07-09 18:45:21,168 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-07-09 18:45:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:21,168 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-07-09 18:45:21,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-07-09 18:45:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:21,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:21,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:21,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-09 18:45:21,389 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 44 times [2021-07-09 18:45:21,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:21,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169479736] [2021-07-09 18:45:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:21,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:21,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169479736] [2021-07-09 18:45:21,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169479736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:21,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220052774] [2021-07-09 18:45:21,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:21,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:21,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:21,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:21,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:21,723 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:21,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:21,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:21,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:45:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220052774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:21,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:21,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:21,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382538207] [2021-07-09 18:45:21,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:21,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:21,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:21,766 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:22,991 INFO L93 Difference]: Finished difference Result 2310 states and 7570 transitions. [2021-07-09 18:45:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:45:22,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:22,995 INFO L225 Difference]: With dead ends: 2310 [2021-07-09 18:45:22,995 INFO L226 Difference]: Without dead ends: 2295 [2021-07-09 18:45:22,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 944.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:45:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-09 18:45:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1638. [2021-07-09 18:45:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.392791692119731) internal successors, (5554), 1637 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5554 transitions. [2021-07-09 18:45:23,018 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5554 transitions. Word has length 26 [2021-07-09 18:45:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:23,018 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5554 transitions. [2021-07-09 18:45:23,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5554 transitions. [2021-07-09 18:45:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:23,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:23,020 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] [2021-07-09 18:45:23,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-09 18:45:23,236 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash -659260211, now seen corresponding path program 61 times [2021-07-09 18:45:23,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:23,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804354935] [2021-07-09 18:45:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:23,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804354935] [2021-07-09 18:45:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804354935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107221805] [2021-07-09 18:45:23,335 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:23,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:23,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:23,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:23,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:23,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:23,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:23,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:23,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107221805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:23,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:23,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:45:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287465435] [2021-07-09 18:45:23,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:23,517 INFO L87 Difference]: Start difference. First operand 1638 states and 5554 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:24,256 INFO L93 Difference]: Finished difference Result 2717 states and 8732 transitions. [2021-07-09 18:45:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:45:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:24,260 INFO L225 Difference]: With dead ends: 2717 [2021-07-09 18:45:24,260 INFO L226 Difference]: Without dead ends: 2695 [2021-07-09 18:45:24,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:45:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-07-09 18:45:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1680. [2021-07-09 18:45:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.4032162001191186) internal successors, (5714), 1679 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5714 transitions. [2021-07-09 18:45:24,305 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5714 transitions. Word has length 26 [2021-07-09 18:45:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:24,305 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5714 transitions. [2021-07-09 18:45:24,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5714 transitions. [2021-07-09 18:45:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:24,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:24,307 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] [2021-07-09 18:45:24,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:24,523 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 62 times [2021-07-09 18:45:24,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:24,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522731682] [2021-07-09 18:45:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:24,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:24,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522731682] [2021-07-09 18:45:24,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522731682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327635591] [2021-07-09 18:45:24,626 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:24,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:24,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:24,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 18:45:24,774 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:45:24,787 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-07-09 18:45:24,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:24,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-09 18:45:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:24,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327635591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:24,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:24,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:45:24,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943515078] [2021-07-09 18:45:24,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:24,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:24,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:24,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:24,830 INFO L87 Difference]: Start difference. First operand 1680 states and 5714 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:26,118 INFO L93 Difference]: Finished difference Result 3323 states and 10531 transitions. [2021-07-09 18:45:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:45:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:26,127 INFO L225 Difference]: With dead ends: 3323 [2021-07-09 18:45:26,127 INFO L226 Difference]: Without dead ends: 3279 [2021-07-09 18:45:26,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 992.1ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:45:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-07-09 18:45:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1708. [2021-07-09 18:45:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.4106619800820153) internal successors, (5822), 1707 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5822 transitions. [2021-07-09 18:45:26,195 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5822 transitions. Word has length 26 [2021-07-09 18:45:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:26,196 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5822 transitions. [2021-07-09 18:45:26,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5822 transitions. [2021-07-09 18:45:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:26,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:26,198 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:26,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:26,400 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 45 times [2021-07-09 18:45:26,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:26,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346403640] [2021-07-09 18:45:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:26,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:26,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346403640] [2021-07-09 18:45:26,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346403640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:26,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849036007] [2021-07-09 18:45:26,520 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:26,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:26,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:26,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:26,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:26,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:26,705 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 19 treesize of output 35 [2021-07-09 18:45:26,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:45:26,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:26,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:45:26,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:150 [2021-07-09 18:45:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:26,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849036007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:26,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:26,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:45:26,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8243088] [2021-07-09 18:45:26,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:26,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:26,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:26,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:26,895 INFO L87 Difference]: Start difference. First operand 1708 states and 5822 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:28,635 INFO L93 Difference]: Finished difference Result 2381 states and 7796 transitions. [2021-07-09 18:45:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:45:28,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:28,640 INFO L225 Difference]: With dead ends: 2381 [2021-07-09 18:45:28,640 INFO L226 Difference]: Without dead ends: 2366 [2021-07-09 18:45:28,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1237.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:45:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-07-09 18:45:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1721. [2021-07-09 18:45:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.4069767441860463) internal successors, (5860), 1720 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5860 transitions. [2021-07-09 18:45:28,669 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5860 transitions. Word has length 26 [2021-07-09 18:45:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:28,669 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5860 transitions. [2021-07-09 18:45:28,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5860 transitions. [2021-07-09 18:45:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:28,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:28,672 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:28,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-09 18:45:28,885 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1649711513, now seen corresponding path program 46 times [2021-07-09 18:45:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532281217] [2021-07-09 18:45:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:28,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:28,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532281217] [2021-07-09 18:45:28,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532281217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:28,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688233894] [2021-07-09 18:45:28,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:29,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:29,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:29,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:29,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:29,131 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:29,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:29,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:29,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:45:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:29,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688233894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:29,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:29,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:45:29,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963758790] [2021-07-09 18:45:29,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:29,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:29,172 INFO L87 Difference]: Start difference. First operand 1721 states and 5860 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:29,935 INFO L93 Difference]: Finished difference Result 2557 states and 8457 transitions. [2021-07-09 18:45:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:45:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:29,940 INFO L225 Difference]: With dead ends: 2557 [2021-07-09 18:45:29,940 INFO L226 Difference]: Without dead ends: 2542 [2021-07-09 18:45:29,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:45:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-09 18:45:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1724. [2021-07-09 18:45:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.4062681369704007) internal successors, (5869), 1723 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5869 transitions. [2021-07-09 18:45:29,984 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5869 transitions. Word has length 26 [2021-07-09 18:45:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:29,984 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5869 transitions. [2021-07-09 18:45:29,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5869 transitions. [2021-07-09 18:45:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:29,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:29,986 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:30,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:30,202 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-07-09 18:45:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:30,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179295952] [2021-07-09 18:45:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:30,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:30,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179295952] [2021-07-09 18:45:30,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179295952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784824089] [2021-07-09 18:45:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:30,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:30,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:30,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:45:30,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:30,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:30,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:45:30,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:45:30,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:30,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:45:30,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-07-09 18:45:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:30,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784824089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:30,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:30,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:45:30,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471496883] [2021-07-09 18:45:30,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:30,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:30,620 INFO L87 Difference]: Start difference. First operand 1724 states and 5869 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-07-09 18:45:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:31,326 INFO L93 Difference]: Finished difference Result 2476 states and 8179 transitions. [2021-07-09 18:45:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:45:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:31,330 INFO L225 Difference]: With dead ends: 2476 [2021-07-09 18:45:31,330 INFO L226 Difference]: Without dead ends: 2451 [2021-07-09 18:45:31,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:45:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-07-09 18:45:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1710. [2021-07-09 18:45:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.4119368051492103) internal successors, (5831), 1709 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5831 transitions. [2021-07-09 18:45:31,356 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5831 transitions. Word has length 26 [2021-07-09 18:45:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:31,356 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5831 transitions. [2021-07-09 18:45:31,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-07-09 18:45:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5831 transitions. [2021-07-09 18:45:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:31,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:31,358 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] [2021-07-09 18:45:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-07-09 18:45:31,573 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 63 times [2021-07-09 18:45:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612341744] [2021-07-09 18:45:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:31,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:31,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612341744] [2021-07-09 18:45:31,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612341744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:31,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265103731] [2021-07-09 18:45:31,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:31,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:31,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:31,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:31,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:31,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:31,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:31,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:31,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:31,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265103731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:31,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:31,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:45:31,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812493542] [2021-07-09 18:45:31,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:31,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:31,869 INFO L87 Difference]: Start difference. First operand 1710 states and 5831 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:32,706 INFO L93 Difference]: Finished difference Result 2583 states and 8404 transitions. [2021-07-09 18:45:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:45:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:32,711 INFO L225 Difference]: With dead ends: 2583 [2021-07-09 18:45:32,711 INFO L226 Difference]: Without dead ends: 2553 [2021-07-09 18:45:32,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-09 18:45:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1766. [2021-07-09 18:45:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 3.405665722379603) internal successors, (6011), 1765 states have internal predecessors, (6011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6011 transitions. [2021-07-09 18:45:32,736 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6011 transitions. Word has length 26 [2021-07-09 18:45:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:32,737 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 6011 transitions. [2021-07-09 18:45:32,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6011 transitions. [2021-07-09 18:45:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:32,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:32,739 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] [2021-07-09 18:45:32,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:32,954 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:32,955 INFO L82 PathProgramCache]: Analyzing trace with hash 402208991, now seen corresponding path program 64 times [2021-07-09 18:45:32,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:32,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713441173] [2021-07-09 18:45:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:33,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:33,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713441173] [2021-07-09 18:45:33,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713441173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:33,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584375393] [2021-07-09 18:45:33,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:33,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:33,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:33,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:33,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:33,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:33,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:33,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:33,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:33,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:33,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584375393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:33,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:33,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:45:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652309584] [2021-07-09 18:45:33,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:33,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:33,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:33,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:33,265 INFO L87 Difference]: Start difference. First operand 1766 states and 6011 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:34,221 INFO L93 Difference]: Finished difference Result 2816 states and 9179 transitions. [2021-07-09 18:45:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:45:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:34,227 INFO L225 Difference]: With dead ends: 2816 [2021-07-09 18:45:34,227 INFO L226 Difference]: Without dead ends: 2794 [2021-07-09 18:45:34,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 842.1ms TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:45:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-07-09 18:45:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1780. [2021-07-09 18:45:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 3.3991006183249017) internal successors, (6047), 1779 states have internal predecessors, (6047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 6047 transitions. [2021-07-09 18:45:34,259 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 6047 transitions. Word has length 26 [2021-07-09 18:45:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:34,259 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 6047 transitions. [2021-07-09 18:45:34,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 6047 transitions. [2021-07-09 18:45:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:34,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:34,262 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] [2021-07-09 18:45:34,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-07-09 18:45:34,478 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 65 times [2021-07-09 18:45:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:34,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022660965] [2021-07-09 18:45:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:34,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022660965] [2021-07-09 18:45:34,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022660965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069930944] [2021-07-09 18:45:34,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:34,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:34,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:34,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:34,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:34,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:34,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:34,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:34,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:34,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069930944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:34,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:34,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:45:34,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505686954] [2021-07-09 18:45:34,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:34,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:34,791 INFO L87 Difference]: Start difference. First operand 1780 states and 6047 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:35,607 INFO L93 Difference]: Finished difference Result 2668 states and 8760 transitions. [2021-07-09 18:45:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:45:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:35,613 INFO L225 Difference]: With dead ends: 2668 [2021-07-09 18:45:35,613 INFO L226 Difference]: Without dead ends: 2649 [2021-07-09 18:45:35,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 693.1ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-07-09 18:45:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 1789. [2021-07-09 18:45:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.402684563758389) internal successors, (6084), 1788 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6084 transitions. [2021-07-09 18:45:35,642 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6084 transitions. Word has length 26 [2021-07-09 18:45:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:35,642 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6084 transitions. [2021-07-09 18:45:35,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6084 transitions. [2021-07-09 18:45:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:35,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:35,645 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:35,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:35,861 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1928409045, now seen corresponding path program 48 times [2021-07-09 18:45:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:35,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890806631] [2021-07-09 18:45:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:36,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890806631] [2021-07-09 18:45:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890806631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923808962] [2021-07-09 18:45:36,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:36,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:36,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:36,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:36,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:45:36,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:45:36,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:36,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:36,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:75 [2021-07-09 18:45:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:36,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923808962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:36,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:36,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-09 18:45:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600113231] [2021-07-09 18:45:36,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:36,312 INFO L87 Difference]: Start difference. First operand 1789 states and 6084 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:37,567 INFO L93 Difference]: Finished difference Result 2769 states and 9024 transitions. [2021-07-09 18:45:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:45:37,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:37,572 INFO L225 Difference]: With dead ends: 2769 [2021-07-09 18:45:37,572 INFO L226 Difference]: Without dead ends: 2754 [2021-07-09 18:45:37,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:45:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-07-09 18:45:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1789. [2021-07-09 18:45:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.3982102908277403) internal successors, (6076), 1788 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6076 transitions. [2021-07-09 18:45:37,629 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6076 transitions. Word has length 26 [2021-07-09 18:45:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:37,629 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6076 transitions. [2021-07-09 18:45:37,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6076 transitions. [2021-07-09 18:45:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:37,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:37,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:37,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:37,847 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 49 times [2021-07-09 18:45:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:37,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265141676] [2021-07-09 18:45:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:37,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:37,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265141676] [2021-07-09 18:45:37,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265141676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:37,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67406811] [2021-07-09 18:45:37,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:38,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:38,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:38,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:38,120 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:38,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:38,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:38,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:45:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:38,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67406811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:38,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:38,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:45:38,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301749438] [2021-07-09 18:45:38,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:38,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:38,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:38,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:38,161 INFO L87 Difference]: Start difference. First operand 1789 states and 6076 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:38,710 INFO L93 Difference]: Finished difference Result 2442 states and 8101 transitions. [2021-07-09 18:45:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:45:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:38,715 INFO L225 Difference]: With dead ends: 2442 [2021-07-09 18:45:38,715 INFO L226 Difference]: Without dead ends: 2417 [2021-07-09 18:45:38,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:45:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-07-09 18:45:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1783. [2021-07-09 18:45:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.3956228956228958) internal successors, (6051), 1782 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6051 transitions. [2021-07-09 18:45:38,741 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6051 transitions. Word has length 26 [2021-07-09 18:45:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:38,741 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6051 transitions. [2021-07-09 18:45:38,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6051 transitions. [2021-07-09 18:45:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:38,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:38,744 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:38,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:38,959 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1815461431, now seen corresponding path program 50 times [2021-07-09 18:45:38,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:38,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645695602] [2021-07-09 18:45:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:39,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:39,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645695602] [2021-07-09 18:45:39,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645695602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:39,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954252950] [2021-07-09 18:45:39,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:39,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:39,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:39,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:45:39,207 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:45:39,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:39,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:39,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:45:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954252950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905914930] [2021-07-09 18:45:39,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:39,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:39,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:39,235 INFO L87 Difference]: Start difference. First operand 1783 states and 6051 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:39,875 INFO L93 Difference]: Finished difference Result 2378 states and 7896 transitions. [2021-07-09 18:45:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:45:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:39,879 INFO L225 Difference]: With dead ends: 2378 [2021-07-09 18:45:39,879 INFO L226 Difference]: Without dead ends: 2363 [2021-07-09 18:45:39,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:45:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-07-09 18:45:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1772. [2021-07-09 18:45:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.399209486166008) internal successors, (6020), 1771 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6020 transitions. [2021-07-09 18:45:39,905 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6020 transitions. Word has length 26 [2021-07-09 18:45:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:39,905 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 6020 transitions. [2021-07-09 18:45:39,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6020 transitions. [2021-07-09 18:45:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:39,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:39,907 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:40,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:40,121 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-07-09 18:45:40,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:40,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651326161] [2021-07-09 18:45:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:40,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:40,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651326161] [2021-07-09 18:45:40,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651326161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:40,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2734569] [2021-07-09 18:45:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:40,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:40,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:40,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:40,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:45:40,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:45:40,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:40,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:45:40,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-07-09 18:45:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:40,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2734569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:40,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:40,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:45:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092640523] [2021-07-09 18:45:40,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:40,521 INFO L87 Difference]: Start difference. First operand 1772 states and 6020 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:40,970 INFO L93 Difference]: Finished difference Result 2374 states and 7919 transitions. [2021-07-09 18:45:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:45:40,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:40,975 INFO L225 Difference]: With dead ends: 2374 [2021-07-09 18:45:40,975 INFO L226 Difference]: Without dead ends: 2359 [2021-07-09 18:45:40,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:45:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-07-09 18:45:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1783. [2021-07-09 18:45:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.4079685746352415) internal successors, (6073), 1782 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6073 transitions. [2021-07-09 18:45:41,021 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6073 transitions. Word has length 26 [2021-07-09 18:45:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:41,021 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6073 transitions. [2021-07-09 18:45:41,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6073 transitions. [2021-07-09 18:45:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:41,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:41,023 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] [2021-07-09 18:45:41,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:41,239 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1092882871, now seen corresponding path program 66 times [2021-07-09 18:45:41,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:41,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187293025] [2021-07-09 18:45:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:41,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:41,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187293025] [2021-07-09 18:45:41,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187293025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:41,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086072857] [2021-07-09 18:45:41,388 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 [2021-07-09 18:45:41,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:41,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:45:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:41,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:41,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:41,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:41,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:41,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:41,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:41,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:41,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:41,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:41,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086072857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:41,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:41,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:45:41,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519227757] [2021-07-09 18:45:41,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:45:41,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:41,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:45:41,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:45:41,577 INFO L87 Difference]: Start difference. First operand 1783 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:42,748 INFO L93 Difference]: Finished difference Result 2367 states and 7833 transitions. [2021-07-09 18:45:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:45:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:42,752 INFO L225 Difference]: With dead ends: 2367 [2021-07-09 18:45:42,752 INFO L226 Difference]: Without dead ends: 2345 [2021-07-09 18:45:42,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 947.5ms TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:45:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-07-09 18:45:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1774. [2021-07-09 18:45:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.412859560067682) internal successors, (6051), 1773 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 6051 transitions. [2021-07-09 18:45:42,779 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 6051 transitions. Word has length 26 [2021-07-09 18:45:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:42,779 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 6051 transitions. [2021-07-09 18:45:42,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 6051 transitions. [2021-07-09 18:45:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:42,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:42,782 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] [2021-07-09 18:45:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:42,992 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash -167389005, now seen corresponding path program 67 times [2021-07-09 18:45:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640168681] [2021-07-09 18:45:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:43,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:43,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640168681] [2021-07-09 18:45:43,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640168681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:43,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918095927] [2021-07-09 18:45:43,176 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 [2021-07-09 18:45:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:45:43,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:43,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:43,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:43,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:45:43,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:45:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:43,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918095927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:43,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:43,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:45:43,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724645370] [2021-07-09 18:45:43,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:43,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:43,342 INFO L87 Difference]: Start difference. First operand 1774 states and 6051 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:44,148 INFO L93 Difference]: Finished difference Result 2445 states and 8079 transitions. [2021-07-09 18:45:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:45:44,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:44,152 INFO L225 Difference]: With dead ends: 2445 [2021-07-09 18:45:44,152 INFO L226 Difference]: Without dead ends: 2426 [2021-07-09 18:45:44,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-07-09 18:45:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1768. [2021-07-09 18:45:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.411431805319751) internal successors, (6028), 1767 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 6028 transitions. [2021-07-09 18:45:44,179 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 6028 transitions. Word has length 26 [2021-07-09 18:45:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:44,179 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 6028 transitions. [2021-07-09 18:45:44,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 6028 transitions. [2021-07-09 18:45:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:44,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:44,195 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] [2021-07-09 18:45:44,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable361 [2021-07-09 18:45:44,396 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 68 times [2021-07-09 18:45:44,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:44,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189929374] [2021-07-09 18:45:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:44,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:44,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189929374] [2021-07-09 18:45:44,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189929374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:44,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484276226] [2021-07-09 18:45:44,536 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 [2021-07-09 18:45:44,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:44,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:44,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:44,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:44,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-09 18:45:44,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:45:44,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:44,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:44,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:45:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:44,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484276226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:44,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:44,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:45:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297388952] [2021-07-09 18:45:44,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:45:44,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:44,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:45:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:45:44,760 INFO L87 Difference]: Start difference. First operand 1768 states and 6028 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:45,558 INFO L93 Difference]: Finished difference Result 2420 states and 8056 transitions. [2021-07-09 18:45:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:45:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:45,563 INFO L225 Difference]: With dead ends: 2420 [2021-07-09 18:45:45,563 INFO L226 Difference]: Without dead ends: 2405 [2021-07-09 18:45:45,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:45:45,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-09 18:45:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1770. [2021-07-09 18:45:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.4132278123233464) internal successors, (6038), 1769 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6038 transitions. [2021-07-09 18:45:45,594 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6038 transitions. Word has length 26 [2021-07-09 18:45:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:45,594 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 6038 transitions. [2021-07-09 18:45:45,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6038 transitions. [2021-07-09 18:45:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:45:45,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:45,598 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] [2021-07-09 18:45:45,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:45,807 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1755833907, now seen corresponding path program 69 times [2021-07-09 18:45:45,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:45,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692384544] [2021-07-09 18:45:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:45,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:45,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692384544] [2021-07-09 18:45:45,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692384544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:45,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730548734] [2021-07-09 18:45:45,931 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 [2021-07-09 18:45:45,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:45,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:46,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:46,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:46,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-09 18:45:46,058 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:45:46,072 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-07-09 18:45:46,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:46,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:45:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730548734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:46,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:46,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:45:46,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345615917] [2021-07-09 18:45:46,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:46,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:46,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:46,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:46,112 INFO L87 Difference]: Start difference. First operand 1770 states and 6038 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:46,743 INFO L93 Difference]: Finished difference Result 2553 states and 8437 transitions. [2021-07-09 18:45:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:45:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:45:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:46,748 INFO L225 Difference]: With dead ends: 2553 [2021-07-09 18:45:46,748 INFO L226 Difference]: Without dead ends: 2523 [2021-07-09 18:45:46,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:45:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-07-09 18:45:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1776. [2021-07-09 18:45:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 3.411830985915493) internal successors, (6056), 1775 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 6056 transitions. [2021-07-09 18:45:46,774 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 6056 transitions. Word has length 26 [2021-07-09 18:45:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:46,774 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 6056 transitions. [2021-07-09 18:45:46,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 6056 transitions. [2021-07-09 18:45:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:46,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:46,777 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:46,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:46,993 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-07-09 18:45:46,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:46,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182845323] [2021-07-09 18:45:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:47,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182845323] [2021-07-09 18:45:47,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182845323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768919625] [2021-07-09 18:45:47,030 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 [2021-07-09 18:45:47,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:47,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:47,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:45:47,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:47,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768919625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:47,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:47,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:45:47,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776737741] [2021-07-09 18:45:47,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:47,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:47,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:47,150 INFO L87 Difference]: Start difference. First operand 1776 states and 6056 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:48,092 INFO L93 Difference]: Finished difference Result 4749 states and 14648 transitions. [2021-07-09 18:45:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:45:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:48,102 INFO L225 Difference]: With dead ends: 4749 [2021-07-09 18:45:48,102 INFO L226 Difference]: Without dead ends: 4749 [2021-07-09 18:45:48,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:45:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2021-07-09 18:45:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 1969. [2021-07-09 18:45:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.4690040650406506) internal successors, (6827), 1968 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6827 transitions. [2021-07-09 18:45:48,147 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6827 transitions. Word has length 28 [2021-07-09 18:45:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:48,147 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6827 transitions. [2021-07-09 18:45:48,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6827 transitions. [2021-07-09 18:45:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:48,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:48,150 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:48,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:48,369 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-07-09 18:45:48,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:48,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887088764] [2021-07-09 18:45:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:48,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:48,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887088764] [2021-07-09 18:45:48,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887088764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:48,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484331559] [2021-07-09 18:45:48,410 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 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 [2021-07-09 18:45:48,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:45:48,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:48,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:45:48,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:48,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484331559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:48,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:48,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:45:48,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406324979] [2021-07-09 18:45:48,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:48,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:48,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:48,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:48,541 INFO L87 Difference]: Start difference. First operand 1969 states and 6827 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:49,746 INFO L93 Difference]: Finished difference Result 6328 states and 19229 transitions. [2021-07-09 18:45:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:45:49,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:49,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:49,759 INFO L225 Difference]: With dead ends: 6328 [2021-07-09 18:45:49,759 INFO L226 Difference]: Without dead ends: 6328 [2021-07-09 18:45:49,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 742.0ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:45:49,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-07-09 18:45:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 1980. [2021-07-09 18:45:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.477008590197069) internal successors, (6881), 1979 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6881 transitions. [2021-07-09 18:45:49,818 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6881 transitions. Word has length 28 [2021-07-09 18:45:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:49,819 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6881 transitions. [2021-07-09 18:45:49,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6881 transitions. [2021-07-09 18:45:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:49,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:49,821 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:50,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:50,037 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-07-09 18:45:50,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:50,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133216340] [2021-07-09 18:45:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:50,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:50,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133216340] [2021-07-09 18:45:50,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133216340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:50,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688178148] [2021-07-09 18:45:50,076 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 [2021-07-09 18:45:50,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:45:50,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:45:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688178148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:50,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:50,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:45:50,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114829217] [2021-07-09 18:45:50,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:50,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:50,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:50,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:50,205 INFO L87 Difference]: Start difference. First operand 1980 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:51,480 INFO L93 Difference]: Finished difference Result 5721 states and 17761 transitions. [2021-07-09 18:45:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:45:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:51,491 INFO L225 Difference]: With dead ends: 5721 [2021-07-09 18:45:51,491 INFO L226 Difference]: Without dead ends: 5721 [2021-07-09 18:45:51,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 768.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:45:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-07-09 18:45:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 1928. [2021-07-09 18:45:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.4504411001556825) internal successors, (6649), 1927 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6649 transitions. [2021-07-09 18:45:51,543 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6649 transitions. Word has length 28 [2021-07-09 18:45:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:51,543 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6649 transitions. [2021-07-09 18:45:51,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6649 transitions. [2021-07-09 18:45:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:51,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:51,546 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:51,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-09 18:45:51,762 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-07-09 18:45:51,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:51,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084499128] [2021-07-09 18:45:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:51,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084499128] [2021-07-09 18:45:51,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084499128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345752557] [2021-07-09 18:45:51,799 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 [2021-07-09 18:45:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:45:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:51,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345752557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:51,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:51,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:45:51,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483206267] [2021-07-09 18:45:51,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:45:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:51,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:45:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:45:51,916 INFO L87 Difference]: Start difference. First operand 1928 states and 6649 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:52,997 INFO L93 Difference]: Finished difference Result 4835 states and 14815 transitions. [2021-07-09 18:45:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:45:52,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:53,008 INFO L225 Difference]: With dead ends: 4835 [2021-07-09 18:45:53,008 INFO L226 Difference]: Without dead ends: 4835 [2021-07-09 18:45:53,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 693.8ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:45:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2021-07-09 18:45:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 1938. [2021-07-09 18:45:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4460505937016004) internal successors, (6675), 1937 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6675 transitions. [2021-07-09 18:45:53,054 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6675 transitions. Word has length 28 [2021-07-09 18:45:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:53,054 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 6675 transitions. [2021-07-09 18:45:53,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6675 transitions. [2021-07-09 18:45:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:53,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:53,057 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] [2021-07-09 18:45:53,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 18:45:53,258 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:53,258 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 70 times [2021-07-09 18:45:53,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:53,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585823892] [2021-07-09 18:45:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:53,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585823892] [2021-07-09 18:45:53,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585823892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289710395] [2021-07-09 18:45:53,300 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 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 [2021-07-09 18:45:53,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:53,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:45:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289710395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:53,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:45:53,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155435605] [2021-07-09 18:45:53,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:45:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:45:53,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:45:53,400 INFO L87 Difference]: Start difference. First operand 1938 states and 6675 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:54,017 INFO L93 Difference]: Finished difference Result 4254 states and 13212 transitions. [2021-07-09 18:45:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:45:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,024 INFO L225 Difference]: With dead ends: 4254 [2021-07-09 18:45:54,024 INFO L226 Difference]: Without dead ends: 4254 [2021-07-09 18:45:54,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 357.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:45:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-07-09 18:45:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 1994. [2021-07-09 18:45:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.431008529854491) internal successors, (6838), 1993 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6838 transitions. [2021-07-09 18:45:54,059 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6838 transitions. Word has length 28 [2021-07-09 18:45:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:54,059 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6838 transitions. [2021-07-09 18:45:54,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6838 transitions. [2021-07-09 18:45:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:54,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:54,062 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] [2021-07-09 18:45:54,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 18:45:54,278 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-07-09 18:45:54,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601590986] [2021-07-09 18:45:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:54,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601590986] [2021-07-09 18:45:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601590986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921423770] [2021-07-09 18:45:54,303 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 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 [2021-07-09 18:45:54,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:54,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:45:54,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:45:54,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921423770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:54,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:54,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:45:54,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265621227] [2021-07-09 18:45:54,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:45:54,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:45:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:45:54,378 INFO L87 Difference]: Start difference. First operand 1994 states and 6838 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:54,543 INFO L93 Difference]: Finished difference Result 3480 states and 11300 transitions. [2021-07-09 18:45:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:45:54,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:54,549 INFO L225 Difference]: With dead ends: 3480 [2021-07-09 18:45:54,549 INFO L226 Difference]: Without dead ends: 3462 [2021-07-09 18:45:54,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:45:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-07-09 18:45:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2379. [2021-07-09 18:45:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.5025231286795626) internal successors, (8329), 2378 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8329 transitions. [2021-07-09 18:45:54,588 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8329 transitions. Word has length 28 [2021-07-09 18:45:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:54,588 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8329 transitions. [2021-07-09 18:45:54,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8329 transitions. [2021-07-09 18:45:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:54,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:54,591 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] [2021-07-09 18:45:54,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:54,791 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:54,792 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-07-09 18:45:54,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:54,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069218178] [2021-07-09 18:45:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:54,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069218178] [2021-07-09 18:45:54,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069218178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:54,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473466581] [2021-07-09 18:45:54,825 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 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 [2021-07-09 18:45:54,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:54,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:54,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:45:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:54,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473466581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:54,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:54,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:45:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583402115] [2021-07-09 18:45:54,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:45:54,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:45:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:45:54,938 INFO L87 Difference]: Start difference. First operand 2379 states and 8329 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:45:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:55,578 INFO L93 Difference]: Finished difference Result 4139 states and 13172 transitions. [2021-07-09 18:45:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:45:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:45:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:55,586 INFO L225 Difference]: With dead ends: 4139 [2021-07-09 18:45:55,586 INFO L226 Difference]: Without dead ends: 4092 [2021-07-09 18:45:55,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:45:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-07-09 18:45:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 2547. [2021-07-09 18:45:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.52356637863315) internal successors, (8971), 2546 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8971 transitions. [2021-07-09 18:45:55,673 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8971 transitions. Word has length 28 [2021-07-09 18:45:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:55,674 INFO L482 AbstractCegarLoop]: Abstraction has 2547 states and 8971 transitions. [2021-07-09 18:45:55,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:45:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8971 transitions. [2021-07-09 18:45:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:55,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:55,677 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] [2021-07-09 18:45:55,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-07-09 18:45:55,893 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1371854597, now seen corresponding path program 71 times [2021-07-09 18:45:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:55,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316129935] [2021-07-09 18:45:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:55,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:55,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316129935] [2021-07-09 18:45:55,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316129935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:55,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050200974] [2021-07-09 18:45:55,929 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 [2021-07-09 18:45:55,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:45:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:45:55,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:56,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050200974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:56,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:56,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:45:56,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549434415] [2021-07-09 18:45:56,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:45:56,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:56,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:45:56,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:45:56,043 INFO L87 Difference]: Start difference. First operand 2547 states and 8971 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-09 18:45:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:56,462 INFO L93 Difference]: Finished difference Result 4980 states and 16523 transitions. [2021-07-09 18:45:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:45:56,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-07-09 18:45:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:56,471 INFO L225 Difference]: With dead ends: 4980 [2021-07-09 18:45:56,472 INFO L226 Difference]: Without dead ends: 4893 [2021-07-09 18:45:56,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-07-09 18:45:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 3198. [2021-07-09 18:45:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3197 states have (on average 3.5376915858617455) internal successors, (11310), 3197 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 11310 transitions. [2021-07-09 18:45:56,539 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 11310 transitions. Word has length 28 [2021-07-09 18:45:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:56,539 INFO L482 AbstractCegarLoop]: Abstraction has 3198 states and 11310 transitions. [2021-07-09 18:45:56,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-09 18:45:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 11310 transitions. [2021-07-09 18:45:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:56,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:56,545 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] [2021-07-09 18:45:56,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-07-09 18:45:56,745 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-07-09 18:45:56,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:56,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876485075] [2021-07-09 18:45:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:56,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:56,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876485075] [2021-07-09 18:45:56,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876485075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:56,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616718649] [2021-07-09 18:45:56,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:56,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:56,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:56,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:45:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616718649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:56,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:56,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:45:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840037237] [2021-07-09 18:45:56,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:45:56,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:45:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:45:56,884 INFO L87 Difference]: Start difference. First operand 3198 states and 11310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:57,632 INFO L93 Difference]: Finished difference Result 5423 states and 17174 transitions. [2021-07-09 18:45:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:45:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:57,642 INFO L225 Difference]: With dead ends: 5423 [2021-07-09 18:45:57,642 INFO L226 Difference]: Without dead ends: 5397 [2021-07-09 18:45:57,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:45:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-07-09 18:45:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 3216. [2021-07-09 18:45:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5430793157076206) internal successors, (11391), 3215 states have internal predecessors, (11391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11391 transitions. [2021-07-09 18:45:57,711 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11391 transitions. Word has length 28 [2021-07-09 18:45:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:57,711 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11391 transitions. [2021-07-09 18:45:57,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11391 transitions. [2021-07-09 18:45:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:57,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:57,716 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] [2021-07-09 18:45:57,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:57,932 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:57,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:57,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-07-09 18:45:57,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:57,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040895411] [2021-07-09 18:45:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:57,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040895411] [2021-07-09 18:45:57,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040895411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333941365] [2021-07-09 18:45:57,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:57,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:45:57,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:45:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333941365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:58,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:58,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:45:58,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133140248] [2021-07-09 18:45:58,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:45:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:58,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:45:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:45:58,068 INFO L87 Difference]: Start difference. First operand 3216 states and 11391 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:58,757 INFO L93 Difference]: Finished difference Result 5478 states and 17366 transitions. [2021-07-09 18:45:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:45:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:58,766 INFO L225 Difference]: With dead ends: 5478 [2021-07-09 18:45:58,766 INFO L226 Difference]: Without dead ends: 5447 [2021-07-09 18:45:58,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:45:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2021-07-09 18:45:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 3206. [2021-07-09 18:45:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.550390015600624) internal successors, (11379), 3205 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 11379 transitions. [2021-07-09 18:45:58,831 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 11379 transitions. Word has length 28 [2021-07-09 18:45:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:58,831 INFO L482 AbstractCegarLoop]: Abstraction has 3206 states and 11379 transitions. [2021-07-09 18:45:58,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 11379 transitions. [2021-07-09 18:45:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:58,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:58,836 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] [2021-07-09 18:45:59,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:59,039 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:59,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-07-09 18:45:59,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:59,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111280104] [2021-07-09 18:45:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:59,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:59,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111280104] [2021-07-09 18:45:59,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111280104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172628758] [2021-07-09 18:45:59,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:59,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:59,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:45:59,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:59,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172628758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:59,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:45:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619363753] [2021-07-09 18:45:59,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:45:59,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:45:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:45:59,196 INFO L87 Difference]: Start difference. First operand 3206 states and 11379 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:59,757 INFO L93 Difference]: Finished difference Result 6636 states and 21425 transitions. [2021-07-09 18:45:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:45:59,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:45:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:59,770 INFO L225 Difference]: With dead ends: 6636 [2021-07-09 18:45:59,770 INFO L226 Difference]: Without dead ends: 6589 [2021-07-09 18:45:59,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:45:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6589 states. [2021-07-09 18:45:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6589 to 3369. [2021-07-09 18:45:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.5973871733966747) internal successors, (12116), 3368 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 12116 transitions. [2021-07-09 18:45:59,854 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 12116 transitions. Word has length 28 [2021-07-09 18:45:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:59,855 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 12116 transitions. [2021-07-09 18:45:59,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 12116 transitions. [2021-07-09 18:45:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:45:59,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:59,860 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] [2021-07-09 18:46:00,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:00,076 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:00,076 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-07-09 18:46:00,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:00,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538218656] [2021-07-09 18:46:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:00,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538218656] [2021-07-09 18:46:00,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538218656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679750756] [2021-07-09 18:46:00,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:46:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:00,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679750756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:00,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:00,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:46:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559178669] [2021-07-09 18:46:00,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:46:00,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:46:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:46:00,176 INFO L87 Difference]: Start difference. First operand 3369 states and 12116 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-09 18:46:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:00,332 INFO L93 Difference]: Finished difference Result 5034 states and 16661 transitions. [2021-07-09 18:46:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:46:00,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-07-09 18:46:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:00,341 INFO L225 Difference]: With dead ends: 5034 [2021-07-09 18:46:00,341 INFO L226 Difference]: Without dead ends: 5034 [2021-07-09 18:46:00,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:46:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-07-09 18:46:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3201. [2021-07-09 18:46:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.556875) internal successors, (11382), 3200 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11382 transitions. [2021-07-09 18:46:00,403 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11382 transitions. Word has length 28 [2021-07-09 18:46:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:00,403 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11382 transitions. [2021-07-09 18:46:00,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-07-09 18:46:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11382 transitions. [2021-07-09 18:46:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:00,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:00,408 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:00,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-07-09 18:46:00,623 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:00,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-07-09 18:46:00,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:00,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684439317] [2021-07-09 18:46:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:00,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:00,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684439317] [2021-07-09 18:46:00,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684439317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:00,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524063646] [2021-07-09 18:46:00,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:00,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:00,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:00,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524063646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:00,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:00,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:46:00,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387074368] [2021-07-09 18:46:00,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:46:00,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:00,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:46:00,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:46:00,787 INFO L87 Difference]: Start difference. First operand 3201 states and 11382 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:46:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:01,459 INFO L93 Difference]: Finished difference Result 7123 states and 22742 transitions. [2021-07-09 18:46:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:46:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:46:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:01,474 INFO L225 Difference]: With dead ends: 7123 [2021-07-09 18:46:01,474 INFO L226 Difference]: Without dead ends: 7123 [2021-07-09 18:46:01,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:46:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2021-07-09 18:46:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 3231. [2021-07-09 18:46:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.556346749226006) internal successors, (11487), 3230 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 11487 transitions. [2021-07-09 18:46:01,562 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 11487 transitions. Word has length 28 [2021-07-09 18:46:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:01,562 INFO L482 AbstractCegarLoop]: Abstraction has 3231 states and 11487 transitions. [2021-07-09 18:46:01,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:46:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 11487 transitions. [2021-07-09 18:46:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:01,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:01,567 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:01,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-09 18:46:01,780 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-07-09 18:46:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:01,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533751785] [2021-07-09 18:46:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:01,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:01,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533751785] [2021-07-09 18:46:01,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533751785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:01,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049086030] [2021-07-09 18:46:01,811 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 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 [2021-07-09 18:46:01,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:46:01,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:01,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049086030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:01,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:01,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:46:01,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601025636] [2021-07-09 18:46:01,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:46:01,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:01,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:46:01,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:46:01,910 INFO L87 Difference]: Start difference. First operand 3231 states and 11487 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:46:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:02,711 INFO L93 Difference]: Finished difference Result 7417 states and 23715 transitions. [2021-07-09 18:46:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:46:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:46:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:02,727 INFO L225 Difference]: With dead ends: 7417 [2021-07-09 18:46:02,727 INFO L226 Difference]: Without dead ends: 7417 [2021-07-09 18:46:02,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:46:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2021-07-09 18:46:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 3361. [2021-07-09 18:46:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 3.5398809523809525) internal successors, (11894), 3360 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 11894 transitions. [2021-07-09 18:46:02,831 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 11894 transitions. Word has length 28 [2021-07-09 18:46:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:02,831 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 11894 transitions. [2021-07-09 18:46:02,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:46:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 11894 transitions. [2021-07-09 18:46:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:02,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:02,836 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] [2021-07-09 18:46:03,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-07-09 18:46:03,052 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-07-09 18:46:03,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:03,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428671307] [2021-07-09 18:46:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:03,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428671307] [2021-07-09 18:46:03,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428671307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034068395] [2021-07-09 18:46:03,081 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 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 [2021-07-09 18:46:03,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:03,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:03,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034068395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:03,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:03,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:46:03,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373206184] [2021-07-09 18:46:03,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:46:03,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:03,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:46:03,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:46:03,166 INFO L87 Difference]: Start difference. First operand 3361 states and 11894 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:03,781 INFO L93 Difference]: Finished difference Result 7892 states and 25256 transitions. [2021-07-09 18:46:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:46:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:03,799 INFO L225 Difference]: With dead ends: 7892 [2021-07-09 18:46:03,799 INFO L226 Difference]: Without dead ends: 7879 [2021-07-09 18:46:03,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:46:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2021-07-09 18:46:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 4006. [2021-07-09 18:46:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4005 states have (on average 3.5845193508114854) internal successors, (14356), 4005 states have internal predecessors, (14356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 14356 transitions. [2021-07-09 18:46:03,910 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 14356 transitions. Word has length 28 [2021-07-09 18:46:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:03,955 INFO L482 AbstractCegarLoop]: Abstraction has 4006 states and 14356 transitions. [2021-07-09 18:46:03,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 14356 transitions. [2021-07-09 18:46:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:03,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:03,962 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] [2021-07-09 18:46:04,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-07-09 18:46:04,177 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-07-09 18:46:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:04,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667348981] [2021-07-09 18:46:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:04,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667348981] [2021-07-09 18:46:04,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667348981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770299647] [2021-07-09 18:46:04,206 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 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 [2021-07-09 18:46:04,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:04,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:04,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:04,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770299647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:04,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:04,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:46:04,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656765850] [2021-07-09 18:46:04,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:46:04,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:46:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:46:04,302 INFO L87 Difference]: Start difference. First operand 4006 states and 14356 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:04,925 INFO L93 Difference]: Finished difference Result 8151 states and 25974 transitions. [2021-07-09 18:46:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:46:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:04,942 INFO L225 Difference]: With dead ends: 8151 [2021-07-09 18:46:04,942 INFO L226 Difference]: Without dead ends: 8151 [2021-07-09 18:46:04,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:46:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-07-09 18:46:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 3759. [2021-07-09 18:46:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 3.5494944119212346) internal successors, (13339), 3758 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 13339 transitions. [2021-07-09 18:46:05,043 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 13339 transitions. Word has length 28 [2021-07-09 18:46:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:05,043 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 13339 transitions. [2021-07-09 18:46:05,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 13339 transitions. [2021-07-09 18:46:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:05,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:05,048 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:05,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-09 18:46:05,253 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-07-09 18:46:05,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:05,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947836443] [2021-07-09 18:46:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:05,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:05,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947836443] [2021-07-09 18:46:05,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947836443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:05,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952088809] [2021-07-09 18:46:05,298 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 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 [2021-07-09 18:46:05,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:46:05,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:05,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:05,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952088809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:05,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:05,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:46:05,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830175539] [2021-07-09 18:46:05,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:46:05,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:46:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:46:05,384 INFO L87 Difference]: Start difference. First operand 3759 states and 13339 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:46:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:06,158 INFO L93 Difference]: Finished difference Result 7259 states and 23813 transitions. [2021-07-09 18:46:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:46:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:46:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:06,173 INFO L225 Difference]: With dead ends: 7259 [2021-07-09 18:46:06,173 INFO L226 Difference]: Without dead ends: 7255 [2021-07-09 18:46:06,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:46:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7255 states. [2021-07-09 18:46:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7255 to 3392. [2021-07-09 18:46:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.5956944854025363) internal successors, (12193), 3391 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 12193 transitions. [2021-07-09 18:46:06,268 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 12193 transitions. Word has length 28 [2021-07-09 18:46:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:06,268 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 12193 transitions. [2021-07-09 18:46:06,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:46:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 12193 transitions. [2021-07-09 18:46:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:06,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:06,274 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:06,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-07-09 18:46:06,490 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-07-09 18:46:06,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:06,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068835177] [2021-07-09 18:46:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:06,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:06,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068835177] [2021-07-09 18:46:06,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068835177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:06,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5855629] [2021-07-09 18:46:06,521 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 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 [2021-07-09 18:46:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:06,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5855629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:06,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:06,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:46:06,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517015353] [2021-07-09 18:46:06,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:06,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:06,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:06,631 INFO L87 Difference]: Start difference. First operand 3392 states and 12193 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:46:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:07,712 INFO L93 Difference]: Finished difference Result 11542 states and 38132 transitions. [2021-07-09 18:46:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:46:07,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-07-09 18:46:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:07,741 INFO L225 Difference]: With dead ends: 11542 [2021-07-09 18:46:07,741 INFO L226 Difference]: Without dead ends: 11542 [2021-07-09 18:46:07,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:46:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2021-07-09 18:46:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 3680. [2021-07-09 18:46:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.678173416689318) internal successors, (13532), 3679 states have internal predecessors, (13532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13532 transitions. [2021-07-09 18:46:07,937 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13532 transitions. Word has length 28 [2021-07-09 18:46:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:07,937 INFO L482 AbstractCegarLoop]: Abstraction has 3680 states and 13532 transitions. [2021-07-09 18:46:07,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:46:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13532 transitions. [2021-07-09 18:46:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:07,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:07,942 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:08,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:08,158 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:08,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:08,158 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-07-09 18:46:08,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:08,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922646412] [2021-07-09 18:46:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:08,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:08,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922646412] [2021-07-09 18:46:08,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922646412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:08,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489249549] [2021-07-09 18:46:08,191 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 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 [2021-07-09 18:46:08,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:08,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:08,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489249549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:08,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:08,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:46:08,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304753550] [2021-07-09 18:46:08,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:08,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:08,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:08,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:08,313 INFO L87 Difference]: Start difference. First operand 3680 states and 13532 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:46:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:09,384 INFO L93 Difference]: Finished difference Result 11234 states and 37308 transitions. [2021-07-09 18:46:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:46:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-07-09 18:46:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:09,408 INFO L225 Difference]: With dead ends: 11234 [2021-07-09 18:46:09,408 INFO L226 Difference]: Without dead ends: 11234 [2021-07-09 18:46:09,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:46:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11234 states. [2021-07-09 18:46:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11234 to 3634. [2021-07-09 18:46:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 3.6584090283512247) internal successors, (13291), 3633 states have internal predecessors, (13291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 13291 transitions. [2021-07-09 18:46:09,599 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 13291 transitions. Word has length 28 [2021-07-09 18:46:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:09,600 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 13291 transitions. [2021-07-09 18:46:09,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-07-09 18:46:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 13291 transitions. [2021-07-09 18:46:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:09,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:09,605 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:09,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-07-09 18:46:09,821 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-07-09 18:46:09,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:09,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343631362] [2021-07-09 18:46:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:09,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343631362] [2021-07-09 18:46:09,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343631362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043760959] [2021-07-09 18:46:09,852 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 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 [2021-07-09 18:46:09,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:46:09,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:09,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:09,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043760959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:09,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:09,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:46:09,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14355904] [2021-07-09 18:46:09,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:09,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:09,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:09,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:09,962 INFO L87 Difference]: Start difference. First operand 3634 states and 13291 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:10,885 INFO L93 Difference]: Finished difference Result 10540 states and 33835 transitions. [2021-07-09 18:46:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:46:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:10,908 INFO L225 Difference]: With dead ends: 10540 [2021-07-09 18:46:10,908 INFO L226 Difference]: Without dead ends: 10540 [2021-07-09 18:46:10,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:46:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2021-07-09 18:46:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 3674. [2021-07-09 18:46:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.662673563844269) internal successors, (13453), 3673 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 13453 transitions. [2021-07-09 18:46:11,044 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 13453 transitions. Word has length 28 [2021-07-09 18:46:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:11,044 INFO L482 AbstractCegarLoop]: Abstraction has 3674 states and 13453 transitions. [2021-07-09 18:46:11,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 13453 transitions. [2021-07-09 18:46:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:11,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:11,052 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:11,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:11,265 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-07-09 18:46:11,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:11,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9156824] [2021-07-09 18:46:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:11,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:11,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9156824] [2021-07-09 18:46:11,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9156824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:11,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115581857] [2021-07-09 18:46:11,295 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 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 [2021-07-09 18:46:11,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:11,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:11,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115581857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:11,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:11,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:46:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253044711] [2021-07-09 18:46:11,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:11,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:11,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:11,399 INFO L87 Difference]: Start difference. First operand 3674 states and 13453 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:12,299 INFO L93 Difference]: Finished difference Result 9924 states and 32320 transitions. [2021-07-09 18:46:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:46:12,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:12,320 INFO L225 Difference]: With dead ends: 9924 [2021-07-09 18:46:12,320 INFO L226 Difference]: Without dead ends: 9916 [2021-07-09 18:46:12,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:46:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9916 states. [2021-07-09 18:46:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9916 to 3640. [2021-07-09 18:46:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 3.6575982412750756) internal successors, (13310), 3639 states have internal predecessors, (13310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 13310 transitions. [2021-07-09 18:46:12,447 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 13310 transitions. Word has length 28 [2021-07-09 18:46:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:12,447 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 13310 transitions. [2021-07-09 18:46:12,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 13310 transitions. [2021-07-09 18:46:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:12,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:12,453 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:12,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:12,669 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-07-09 18:46:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:12,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012674659] [2021-07-09 18:46:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:12,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012674659] [2021-07-09 18:46:12,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012674659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128615271] [2021-07-09 18:46:12,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:46:12,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:46:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:12,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128615271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:12,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:12,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:46:12,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104253755] [2021-07-09 18:46:12,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:12,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:12,806 INFO L87 Difference]: Start difference. First operand 3640 states and 13310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:13,777 INFO L93 Difference]: Finished difference Result 9536 states and 31236 transitions. [2021-07-09 18:46:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:46:13,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:13,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:13,795 INFO L225 Difference]: With dead ends: 9536 [2021-07-09 18:46:13,795 INFO L226 Difference]: Without dead ends: 9536 [2021-07-09 18:46:13,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:46:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9536 states. [2021-07-09 18:46:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9536 to 3656. [2021-07-09 18:46:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 3.6590971272229824) internal successors, (13374), 3655 states have internal predecessors, (13374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13374 transitions. [2021-07-09 18:46:13,906 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13374 transitions. Word has length 28 [2021-07-09 18:46:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:13,906 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 13374 transitions. [2021-07-09 18:46:13,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13374 transitions. [2021-07-09 18:46:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:13,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:13,911 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:14,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:14,127 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:14,127 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-07-09 18:46:14,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:14,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317780261] [2021-07-09 18:46:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:14,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:14,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317780261] [2021-07-09 18:46:14,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317780261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:14,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740210508] [2021-07-09 18:46:14,158 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 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 [2021-07-09 18:46:14,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:46:14,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:14,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740210508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:14,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:14,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:46:14,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444799304] [2021-07-09 18:46:14,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:14,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:14,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:14,259 INFO L87 Difference]: Start difference. First operand 3656 states and 13374 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:15,079 INFO L93 Difference]: Finished difference Result 9201 states and 30441 transitions. [2021-07-09 18:46:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:46:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:15,101 INFO L225 Difference]: With dead ends: 9201 [2021-07-09 18:46:15,101 INFO L226 Difference]: Without dead ends: 9193 [2021-07-09 18:46:15,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:46:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-07-09 18:46:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 3324. [2021-07-09 18:46:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 3.570869696057779) internal successors, (11866), 3323 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 11866 transitions. [2021-07-09 18:46:15,221 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 11866 transitions. Word has length 28 [2021-07-09 18:46:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:15,222 INFO L482 AbstractCegarLoop]: Abstraction has 3324 states and 11866 transitions. [2021-07-09 18:46:15,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 11866 transitions. [2021-07-09 18:46:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:15,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:15,227 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:15,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:15,431 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-07-09 18:46:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:15,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759405422] [2021-07-09 18:46:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:15,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:15,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759405422] [2021-07-09 18:46:15,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759405422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:15,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757881304] [2021-07-09 18:46:15,468 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 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 [2021-07-09 18:46:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:15,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:15,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757881304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:15,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:15,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:46:15,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804227161] [2021-07-09 18:46:15,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:15,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:15,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:15,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:15,576 INFO L87 Difference]: Start difference. First operand 3324 states and 11866 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:16,422 INFO L93 Difference]: Finished difference Result 6988 states and 22842 transitions. [2021-07-09 18:46:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:46:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:16,436 INFO L225 Difference]: With dead ends: 6988 [2021-07-09 18:46:16,437 INFO L226 Difference]: Without dead ends: 6988 [2021-07-09 18:46:16,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:46:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-07-09 18:46:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 3336. [2021-07-09 18:46:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 3.569415292353823) internal successors, (11904), 3335 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 11904 transitions. [2021-07-09 18:46:16,526 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 11904 transitions. Word has length 28 [2021-07-09 18:46:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:16,526 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 11904 transitions. [2021-07-09 18:46:16,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 11904 transitions. [2021-07-09 18:46:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:16,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:16,531 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:16,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-09 18:46:16,747 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-07-09 18:46:16,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:16,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381199880] [2021-07-09 18:46:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:16,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:16,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381199880] [2021-07-09 18:46:16,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381199880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042601918] [2021-07-09 18:46:16,779 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 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 [2021-07-09 18:46:16,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:16,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:16,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:16,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042601918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:16,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:16,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:46:16,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736286303] [2021-07-09 18:46:16,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:16,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:16,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:16,900 INFO L87 Difference]: Start difference. First operand 3336 states and 11904 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:18,033 INFO L93 Difference]: Finished difference Result 7916 states and 25231 transitions. [2021-07-09 18:46:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:46:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:18,049 INFO L225 Difference]: With dead ends: 7916 [2021-07-09 18:46:18,049 INFO L226 Difference]: Without dead ends: 7916 [2021-07-09 18:46:18,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 703.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:46:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-07-09 18:46:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 3402. [2021-07-09 18:46:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5639517788885624) internal successors, (12121), 3401 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) [2021-07-09 18:46:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12121 transitions. [2021-07-09 18:46:18,179 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12121 transitions. Word has length 28 [2021-07-09 18:46:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:18,179 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 12121 transitions. [2021-07-09 18:46:18,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12121 transitions. [2021-07-09 18:46:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:18,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:18,184 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:18,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-09 18:46:18,397 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-07-09 18:46:18,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:18,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800629975] [2021-07-09 18:46:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:18,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:18,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800629975] [2021-07-09 18:46:18,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800629975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:18,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993861439] [2021-07-09 18:46:18,442 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 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 [2021-07-09 18:46:18,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:46:18,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:18,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:18,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993861439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:18,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:18,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:46:18,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498133741] [2021-07-09 18:46:18,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:18,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:18,564 INFO L87 Difference]: Start difference. First operand 3402 states and 12121 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:19,629 INFO L93 Difference]: Finished difference Result 7299 states and 23603 transitions. [2021-07-09 18:46:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:46:19,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:19,643 INFO L225 Difference]: With dead ends: 7299 [2021-07-09 18:46:19,643 INFO L226 Difference]: Without dead ends: 7295 [2021-07-09 18:46:19,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 649.1ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:46:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7295 states. [2021-07-09 18:46:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7295 to 3337. [2021-07-09 18:46:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 3.5617505995203835) internal successors, (11882), 3336 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 11882 transitions. [2021-07-09 18:46:19,734 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 11882 transitions. Word has length 28 [2021-07-09 18:46:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:19,734 INFO L482 AbstractCegarLoop]: Abstraction has 3337 states and 11882 transitions. [2021-07-09 18:46:19,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 11882 transitions. [2021-07-09 18:46:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:19,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:19,739 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] [2021-07-09 18:46:19,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-09 18:46:19,954 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:19,955 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 72 times [2021-07-09 18:46:19,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:19,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194184956] [2021-07-09 18:46:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:19,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194184956] [2021-07-09 18:46:19,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194184956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263492256] [2021-07-09 18:46:19,991 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 [2021-07-09 18:46:20,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:46:20,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:20,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:20,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263492256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:20,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:20,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:46:20,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076371218] [2021-07-09 18:46:20,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:20,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:20,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:20,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:20,085 INFO L87 Difference]: Start difference. First operand 3337 states and 11882 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:20,670 INFO L93 Difference]: Finished difference Result 6442 states and 21191 transitions. [2021-07-09 18:46:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:46:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:20,681 INFO L225 Difference]: With dead ends: 6442 [2021-07-09 18:46:20,681 INFO L226 Difference]: Without dead ends: 6442 [2021-07-09 18:46:20,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:46:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6442 states. [2021-07-09 18:46:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6442 to 3341. [2021-07-09 18:46:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5634730538922157) internal successors, (11902), 3340 states have internal predecessors, (11902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 11902 transitions. [2021-07-09 18:46:20,757 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 11902 transitions. Word has length 28 [2021-07-09 18:46:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:20,757 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 11902 transitions. [2021-07-09 18:46:20,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 11902 transitions. [2021-07-09 18:46:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:20,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:20,762 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] [2021-07-09 18:46:20,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-07-09 18:46:20,963 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:20,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 73 times [2021-07-09 18:46:20,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:20,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400453840] [2021-07-09 18:46:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:21,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:21,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400453840] [2021-07-09 18:46:21,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400453840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:21,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174894605] [2021-07-09 18:46:21,003 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 [2021-07-09 18:46:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:21,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174894605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:21,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:21,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:46:21,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876400505] [2021-07-09 18:46:21,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:21,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:21,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:21,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:21,098 INFO L87 Difference]: Start difference. First operand 3341 states and 11902 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:21,880 INFO L93 Difference]: Finished difference Result 6916 states and 22513 transitions. [2021-07-09 18:46:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:46:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:21,894 INFO L225 Difference]: With dead ends: 6916 [2021-07-09 18:46:21,895 INFO L226 Difference]: Without dead ends: 6916 [2021-07-09 18:46:21,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:46:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-07-09 18:46:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3355. [2021-07-09 18:46:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 3.5608228980322005) internal successors, (11943), 3354 states have internal predecessors, (11943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 11943 transitions. [2021-07-09 18:46:21,980 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 11943 transitions. Word has length 28 [2021-07-09 18:46:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:21,980 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 11943 transitions. [2021-07-09 18:46:21,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 11943 transitions. [2021-07-09 18:46:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:21,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:21,985 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] [2021-07-09 18:46:22,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-07-09 18:46:22,201 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 74 times [2021-07-09 18:46:22,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:22,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995772560] [2021-07-09 18:46:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:22,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:22,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995772560] [2021-07-09 18:46:22,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995772560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:22,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335698530] [2021-07-09 18:46:22,239 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 [2021-07-09 18:46:22,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:22,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:22,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:22,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335698530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:22,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:22,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:46:22,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993105117] [2021-07-09 18:46:22,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:22,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:22,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:22,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:22,335 INFO L87 Difference]: Start difference. First operand 3355 states and 11943 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:23,211 INFO L93 Difference]: Finished difference Result 7422 states and 23945 transitions. [2021-07-09 18:46:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:46:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:23,226 INFO L225 Difference]: With dead ends: 7422 [2021-07-09 18:46:23,226 INFO L226 Difference]: Without dead ends: 7422 [2021-07-09 18:46:23,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:46:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-07-09 18:46:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 3435. [2021-07-09 18:46:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.554164239953407) internal successors, (12205), 3434 states have internal predecessors, (12205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 12205 transitions. [2021-07-09 18:46:23,322 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 12205 transitions. Word has length 28 [2021-07-09 18:46:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:23,322 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 12205 transitions. [2021-07-09 18:46:23,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 12205 transitions. [2021-07-09 18:46:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:23,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:23,328 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] [2021-07-09 18:46:23,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-07-09 18:46:23,544 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:23,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 75 times [2021-07-09 18:46:23,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:23,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936717330] [2021-07-09 18:46:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:23,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936717330] [2021-07-09 18:46:23,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936717330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919705709] [2021-07-09 18:46:23,574 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 [2021-07-09 18:46:23,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:46:23,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:23,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:23,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919705709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:23,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:23,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:46:23,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970104061] [2021-07-09 18:46:23,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:23,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:23,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:23,682 INFO L87 Difference]: Start difference. First operand 3435 states and 12205 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-07-09 18:46:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:24,264 INFO L93 Difference]: Finished difference Result 7221 states and 24725 transitions. [2021-07-09 18:46:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:46:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 28 [2021-07-09 18:46:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:24,278 INFO L225 Difference]: With dead ends: 7221 [2021-07-09 18:46:24,279 INFO L226 Difference]: Without dead ends: 7221 [2021-07-09 18:46:24,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:46:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-07-09 18:46:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4565. [2021-07-09 18:46:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.672655565293602) internal successors, (16762), 4564 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16762 transitions. [2021-07-09 18:46:24,367 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16762 transitions. Word has length 28 [2021-07-09 18:46:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:24,367 INFO L482 AbstractCegarLoop]: Abstraction has 4565 states and 16762 transitions. [2021-07-09 18:46:24,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-07-09 18:46:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16762 transitions. [2021-07-09 18:46:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:24,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:24,373 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] [2021-07-09 18:46:24,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-09 18:46:24,589 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 76 times [2021-07-09 18:46:24,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:24,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460079617] [2021-07-09 18:46:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:24,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460079617] [2021-07-09 18:46:24,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460079617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198819813] [2021-07-09 18:46:24,626 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 [2021-07-09 18:46:24,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:24,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:24,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198819813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:24,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:24,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:46:24,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127420910] [2021-07-09 18:46:24,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:24,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:24,714 INFO L87 Difference]: Start difference. First operand 4565 states and 16762 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:25,511 INFO L93 Difference]: Finished difference Result 8350 states and 28540 transitions. [2021-07-09 18:46:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:46:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:25,530 INFO L225 Difference]: With dead ends: 8350 [2021-07-09 18:46:25,530 INFO L226 Difference]: Without dead ends: 8346 [2021-07-09 18:46:25,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 489.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:46:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-07-09 18:46:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 4457. [2021-07-09 18:46:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 3.683572710951526) internal successors, (16414), 4456 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 16414 transitions. [2021-07-09 18:46:25,650 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 16414 transitions. Word has length 28 [2021-07-09 18:46:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:25,650 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 16414 transitions. [2021-07-09 18:46:25,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 16414 transitions. [2021-07-09 18:46:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:25,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:25,657 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] [2021-07-09 18:46:25,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-07-09 18:46:25,871 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-07-09 18:46:25,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:25,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144815564] [2021-07-09 18:46:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:25,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144815564] [2021-07-09 18:46:25,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144815564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:25,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657144478] [2021-07-09 18:46:25,896 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 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 [2021-07-09 18:46:25,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657144478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:26,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:26,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:46:26,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366296603] [2021-07-09 18:46:26,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:26,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:26,001 INFO L87 Difference]: Start difference. First operand 4457 states and 16414 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:26,887 INFO L93 Difference]: Finished difference Result 9491 states and 32102 transitions. [2021-07-09 18:46:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:46:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:46:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:26,908 INFO L225 Difference]: With dead ends: 9491 [2021-07-09 18:46:26,909 INFO L226 Difference]: Without dead ends: 9479 [2021-07-09 18:46:26,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:46:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-07-09 18:46:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 4937. [2021-07-09 18:46:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 3.7670178282009723) internal successors, (18594), 4936 states have internal predecessors, (18594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 18594 transitions. [2021-07-09 18:46:27,129 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 18594 transitions. Word has length 28 [2021-07-09 18:46:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:27,129 INFO L482 AbstractCegarLoop]: Abstraction has 4937 states and 18594 transitions. [2021-07-09 18:46:27,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 18594 transitions. [2021-07-09 18:46:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:27,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:27,137 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] [2021-07-09 18:46:27,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:27,353 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-07-09 18:46:27,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:27,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521928909] [2021-07-09 18:46:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:27,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:27,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521928909] [2021-07-09 18:46:27,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521928909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:27,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552492929] [2021-07-09 18:46:27,378 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 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 [2021-07-09 18:46:27,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:27,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552492929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:27,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:27,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:46:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246543595] [2021-07-09 18:46:27,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:27,471 INFO L87 Difference]: Start difference. First operand 4937 states and 18594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:28,337 INFO L93 Difference]: Finished difference Result 9821 states and 33130 transitions. [2021-07-09 18:46:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:46:28,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:46:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:28,361 INFO L225 Difference]: With dead ends: 9821 [2021-07-09 18:46:28,361 INFO L226 Difference]: Without dead ends: 9821 [2021-07-09 18:46:28,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:46:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2021-07-09 18:46:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 4957. [2021-07-09 18:46:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.7516142050040355) internal successors, (18593), 4956 states have internal predecessors, (18593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 18593 transitions. [2021-07-09 18:46:28,490 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 18593 transitions. Word has length 28 [2021-07-09 18:46:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:28,490 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 18593 transitions. [2021-07-09 18:46:28,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 18593 transitions. [2021-07-09 18:46:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:28,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:28,498 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] [2021-07-09 18:46:28,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:28,713 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-07-09 18:46:28,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:28,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881363879] [2021-07-09 18:46:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:28,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:28,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881363879] [2021-07-09 18:46:28,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881363879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:28,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905352405] [2021-07-09 18:46:28,744 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 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 [2021-07-09 18:46:28,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:28,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:28,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905352405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:28,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:28,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:46:28,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752995058] [2021-07-09 18:46:28,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:46:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:46:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:46:28,823 INFO L87 Difference]: Start difference. First operand 4957 states and 18593 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:29,248 INFO L93 Difference]: Finished difference Result 9285 states and 33102 transitions. [2021-07-09 18:46:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:46:29,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:29,271 INFO L225 Difference]: With dead ends: 9285 [2021-07-09 18:46:29,271 INFO L226 Difference]: Without dead ends: 9202 [2021-07-09 18:46:29,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:46:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-07-09 18:46:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6390. [2021-07-09 18:46:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6389 states have (on average 3.796994834872437) internal successors, (24259), 6389 states have internal predecessors, (24259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 24259 transitions. [2021-07-09 18:46:29,461 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 24259 transitions. Word has length 28 [2021-07-09 18:46:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:29,461 INFO L482 AbstractCegarLoop]: Abstraction has 6390 states and 24259 transitions. [2021-07-09 18:46:29,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 24259 transitions. [2021-07-09 18:46:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:29,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:29,472 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] [2021-07-09 18:46:29,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-07-09 18:46:29,688 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-07-09 18:46:29,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:29,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760124480] [2021-07-09 18:46:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:29,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:29,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760124480] [2021-07-09 18:46:29,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760124480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:29,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515022631] [2021-07-09 18:46:29,712 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:46:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:46:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:29,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515022631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:29,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:29,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:46:29,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752321405] [2021-07-09 18:46:29,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:46:29,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:29,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:46:29,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:46:29,802 INFO L87 Difference]: Start difference. First operand 6390 states and 24259 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:29,982 INFO L93 Difference]: Finished difference Result 8836 states and 31362 transitions. [2021-07-09 18:46:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:46:29,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:30,003 INFO L225 Difference]: With dead ends: 8836 [2021-07-09 18:46:30,003 INFO L226 Difference]: Without dead ends: 8836 [2021-07-09 18:46:30,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:46:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-07-09 18:46:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6536. [2021-07-09 18:46:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 3.7749043611323643) internal successors, (24669), 6535 states have internal predecessors, (24669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 24669 transitions. [2021-07-09 18:46:30,161 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 24669 transitions. Word has length 28 [2021-07-09 18:46:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:30,162 INFO L482 AbstractCegarLoop]: Abstraction has 6536 states and 24669 transitions. [2021-07-09 18:46:30,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 24669 transitions. [2021-07-09 18:46:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:30,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:30,174 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:30,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:30,390 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:30,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-07-09 18:46:30,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:30,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136658639] [2021-07-09 18:46:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:30,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:30,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136658639] [2021-07-09 18:46:30,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136658639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:30,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357484186] [2021-07-09 18:46:30,427 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 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 [2021-07-09 18:46:30,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:30,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:30,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357484186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:30,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:30,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:46:30,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711676230] [2021-07-09 18:46:30,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:46:30,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:46:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:46:30,511 INFO L87 Difference]: Start difference. First operand 6536 states and 24669 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:31,235 INFO L93 Difference]: Finished difference Result 13521 states and 47319 transitions. [2021-07-09 18:46:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:46:31,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:31,327 INFO L225 Difference]: With dead ends: 13521 [2021-07-09 18:46:31,327 INFO L226 Difference]: Without dead ends: 13521 [2021-07-09 18:46:31,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:46:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2021-07-09 18:46:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 7289. [2021-07-09 18:46:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7288 states have (on average 3.784714599341383) internal successors, (27583), 7288 states have internal predecessors, (27583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 27583 transitions. [2021-07-09 18:46:31,554 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 27583 transitions. Word has length 28 [2021-07-09 18:46:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:31,554 INFO L482 AbstractCegarLoop]: Abstraction has 7289 states and 27583 transitions. [2021-07-09 18:46:31,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 27583 transitions. [2021-07-09 18:46:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:31,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:31,567 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:31,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:31,783 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:31,783 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-07-09 18:46:31,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:31,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837541735] [2021-07-09 18:46:31,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:31,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:31,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837541735] [2021-07-09 18:46:31,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837541735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:31,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908493979] [2021-07-09 18:46:31,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:46:31,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:46:31,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:31,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:31,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908493979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:31,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:31,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:46:31,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870770841] [2021-07-09 18:46:31,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:46:31,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:31,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:46:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:46:31,904 INFO L87 Difference]: Start difference. First operand 7289 states and 27583 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:32,600 INFO L93 Difference]: Finished difference Result 13718 states and 48041 transitions. [2021-07-09 18:46:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:46:32,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:32,638 INFO L225 Difference]: With dead ends: 13718 [2021-07-09 18:46:32,638 INFO L226 Difference]: Without dead ends: 13718 [2021-07-09 18:46:32,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:46:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13718 states. [2021-07-09 18:46:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 7565. [2021-07-09 18:46:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7565 states, 7564 states have (on average 3.7618984664198836) internal successors, (28455), 7564 states have internal predecessors, (28455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 28455 transitions. [2021-07-09 18:46:32,848 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 28455 transitions. Word has length 28 [2021-07-09 18:46:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:32,848 INFO L482 AbstractCegarLoop]: Abstraction has 7565 states and 28455 transitions. [2021-07-09 18:46:32,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 28455 transitions. [2021-07-09 18:46:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:32,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:32,861 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] [2021-07-09 18:46:33,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-09 18:46:33,076 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 82 times [2021-07-09 18:46:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:33,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283003325] [2021-07-09 18:46:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:33,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:33,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283003325] [2021-07-09 18:46:33,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283003325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:33,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006309253] [2021-07-09 18:46:33,103 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 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 [2021-07-09 18:46:33,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:33,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:33,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:33,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006309253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:33,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:33,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:46:33,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642481705] [2021-07-09 18:46:33,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:33,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:33,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:33,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:46:33,193 INFO L87 Difference]: Start difference. First operand 7565 states and 28455 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:33,564 INFO L93 Difference]: Finished difference Result 10107 states and 36572 transitions. [2021-07-09 18:46:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:46:33,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:33,588 INFO L225 Difference]: With dead ends: 10107 [2021-07-09 18:46:33,588 INFO L226 Difference]: Without dead ends: 10077 [2021-07-09 18:46:33,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:46:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10077 states. [2021-07-09 18:46:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10077 to 8418. [2021-07-09 18:46:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7842461684685755) internal successors, (31852), 8417 states have internal predecessors, (31852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31852 transitions. [2021-07-09 18:46:33,785 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31852 transitions. Word has length 28 [2021-07-09 18:46:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:33,786 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 31852 transitions. [2021-07-09 18:46:33,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31852 transitions. [2021-07-09 18:46:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:33,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:33,801 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] [2021-07-09 18:46:34,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 18:46:34,016 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 83 times [2021-07-09 18:46:34,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:34,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486945752] [2021-07-09 18:46:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:34,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:34,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486945752] [2021-07-09 18:46:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486945752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:34,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909473877] [2021-07-09 18:46:34,041 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 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 [2021-07-09 18:46:34,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:46:34,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:34,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909473877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:34,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:34,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:46:34,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736189661] [2021-07-09 18:46:34,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:46:34,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:34,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:46:34,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:46:34,120 INFO L87 Difference]: Start difference. First operand 8418 states and 31852 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:34,496 INFO L93 Difference]: Finished difference Result 10717 states and 38597 transitions. [2021-07-09 18:46:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:46:34,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:34,522 INFO L225 Difference]: With dead ends: 10717 [2021-07-09 18:46:34,522 INFO L226 Difference]: Without dead ends: 10717 [2021-07-09 18:46:34,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:46:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10717 states. [2021-07-09 18:46:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10717 to 8458. [2021-07-09 18:46:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8458 states, 8457 states have (on average 3.780418588151827) internal successors, (31971), 8457 states have internal predecessors, (31971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8458 states to 8458 states and 31971 transitions. [2021-07-09 18:46:34,707 INFO L78 Accepts]: Start accepts. Automaton has 8458 states and 31971 transitions. Word has length 28 [2021-07-09 18:46:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:34,707 INFO L482 AbstractCegarLoop]: Abstraction has 8458 states and 31971 transitions. [2021-07-09 18:46:34,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 8458 states and 31971 transitions. [2021-07-09 18:46:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:34,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:34,722 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:34,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:34,929 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 84 times [2021-07-09 18:46:34,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:34,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918140986] [2021-07-09 18:46:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:34,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:34,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918140986] [2021-07-09 18:46:34,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918140986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:34,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602970503] [2021-07-09 18:46:34,960 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 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 [2021-07-09 18:46:34,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:46:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:35,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602970503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:35,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:35,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:46:35,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421373964] [2021-07-09 18:46:35,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:46:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:46:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:46:35,033 INFO L87 Difference]: Start difference. First operand 8458 states and 31971 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:35,647 INFO L93 Difference]: Finished difference Result 14431 states and 51407 transitions. [2021-07-09 18:46:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:46:35,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:35,691 INFO L225 Difference]: With dead ends: 14431 [2021-07-09 18:46:35,691 INFO L226 Difference]: Without dead ends: 14427 [2021-07-09 18:46:35,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:46:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-07-09 18:46:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 8356. [2021-07-09 18:46:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8356 states, 8355 states have (on average 3.784320766008378) internal successors, (31618), 8355 states have internal predecessors, (31618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8356 states to 8356 states and 31618 transitions. [2021-07-09 18:46:35,942 INFO L78 Accepts]: Start accepts. Automaton has 8356 states and 31618 transitions. Word has length 28 [2021-07-09 18:46:35,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:35,942 INFO L482 AbstractCegarLoop]: Abstraction has 8356 states and 31618 transitions. [2021-07-09 18:46:35,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8356 states and 31618 transitions. [2021-07-09 18:46:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:35,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:35,958 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] [2021-07-09 18:46:36,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-07-09 18:46:36,175 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 85 times [2021-07-09 18:46:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:36,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913025993] [2021-07-09 18:46:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:36,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913025993] [2021-07-09 18:46:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913025993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131087318] [2021-07-09 18:46:36,203 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 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 [2021-07-09 18:46:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:46:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:36,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131087318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:36,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:36,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:46:36,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523166830] [2021-07-09 18:46:36,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:46:36,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:46:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:46:36,284 INFO L87 Difference]: Start difference. First operand 8356 states and 31618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:36,747 INFO L93 Difference]: Finished difference Result 10928 states and 39376 transitions. [2021-07-09 18:46:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:46:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:36,777 INFO L225 Difference]: With dead ends: 10928 [2021-07-09 18:46:36,777 INFO L226 Difference]: Without dead ends: 10928 [2021-07-09 18:46:36,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:46:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2021-07-09 18:46:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 8277. [2021-07-09 18:46:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.779603673272112) internal successors, (31280), 8276 states have internal predecessors, (31280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31280 transitions. [2021-07-09 18:46:36,965 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31280 transitions. Word has length 28 [2021-07-09 18:46:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:36,965 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31280 transitions. [2021-07-09 18:46:36,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31280 transitions. [2021-07-09 18:46:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:36,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:36,979 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:37,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:37,195 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:37,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 86 times [2021-07-09 18:46:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:37,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851161771] [2021-07-09 18:46:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:37,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:37,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851161771] [2021-07-09 18:46:37,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851161771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:37,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404471519] [2021-07-09 18:46:37,232 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 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 [2021-07-09 18:46:37,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:37,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:37,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404471519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:37,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:37,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:46:37,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024654730] [2021-07-09 18:46:37,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:46:37,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:37,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:46:37,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:46:37,316 INFO L87 Difference]: Start difference. First operand 8277 states and 31280 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:38,055 INFO L93 Difference]: Finished difference Result 14287 states and 50815 transitions. [2021-07-09 18:46:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:46:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:38,093 INFO L225 Difference]: With dead ends: 14287 [2021-07-09 18:46:38,093 INFO L226 Difference]: Without dead ends: 14275 [2021-07-09 18:46:38,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:46:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2021-07-09 18:46:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 8277. [2021-07-09 18:46:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.7791203479942) internal successors, (31276), 8276 states have internal predecessors, (31276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31276 transitions. [2021-07-09 18:46:38,320 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31276 transitions. Word has length 28 [2021-07-09 18:46:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:38,320 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31276 transitions. [2021-07-09 18:46:38,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31276 transitions. [2021-07-09 18:46:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:38,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:38,334 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:38,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-07-09 18:46:38,550 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 87 times [2021-07-09 18:46:38,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:38,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336431928] [2021-07-09 18:46:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:38,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:38,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336431928] [2021-07-09 18:46:38,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336431928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:38,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761409815] [2021-07-09 18:46:38,586 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 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 [2021-07-09 18:46:38,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:46:38,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:38,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761409815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:38,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:38,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:46:38,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572566684] [2021-07-09 18:46:38,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:38,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:38,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:38,684 INFO L87 Difference]: Start difference. First operand 8277 states and 31276 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:39,946 INFO L93 Difference]: Finished difference Result 21967 states and 76854 transitions. [2021-07-09 18:46:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:46:39,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:46:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:40,009 INFO L225 Difference]: With dead ends: 21967 [2021-07-09 18:46:40,009 INFO L226 Difference]: Without dead ends: 21967 [2021-07-09 18:46:40,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 757.6ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:46:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21967 states. [2021-07-09 18:46:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21967 to 11428. [2021-07-09 18:46:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 3.8238382777631923) internal successors, (43695), 11427 states have internal predecessors, (43695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 43695 transitions. [2021-07-09 18:46:40,465 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 43695 transitions. Word has length 28 [2021-07-09 18:46:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:40,465 INFO L482 AbstractCegarLoop]: Abstraction has 11428 states and 43695 transitions. [2021-07-09 18:46:40,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 43695 transitions. [2021-07-09 18:46:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:40,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:40,485 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:40,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-07-09 18:46:40,701 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 88 times [2021-07-09 18:46:40,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:40,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539598395] [2021-07-09 18:46:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:40,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539598395] [2021-07-09 18:46:40,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539598395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386366375] [2021-07-09 18:46:40,737 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 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 [2021-07-09 18:46:40,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:40,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:40,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386366375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:40,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:40,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:46:40,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128809761] [2021-07-09 18:46:40,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:40,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:40,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:40,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:40,824 INFO L87 Difference]: Start difference. First operand 11428 states and 43695 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:41,933 INFO L93 Difference]: Finished difference Result 21082 states and 74573 transitions. [2021-07-09 18:46:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:46:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:46:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:41,993 INFO L225 Difference]: With dead ends: 21082 [2021-07-09 18:46:41,993 INFO L226 Difference]: Without dead ends: 21070 [2021-07-09 18:46:41,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:46:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2021-07-09 18:46:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 11250. [2021-07-09 18:46:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.8307405102675793) internal successors, (43092), 11249 states have internal predecessors, (43092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 43092 transitions. [2021-07-09 18:46:42,476 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 43092 transitions. Word has length 28 [2021-07-09 18:46:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:42,476 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 43092 transitions. [2021-07-09 18:46:42,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 43092 transitions. [2021-07-09 18:46:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:42,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:42,497 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:42,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:42,713 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:42,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 89 times [2021-07-09 18:46:42,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:42,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311247438] [2021-07-09 18:46:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:42,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:42,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311247438] [2021-07-09 18:46:42,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311247438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:42,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319287485] [2021-07-09 18:46:42,751 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 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 [2021-07-09 18:46:42,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:46:42,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:42,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319287485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:42,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:42,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:46:42,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146010562] [2021-07-09 18:46:42,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:46:42,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:46:42,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:46:42,842 INFO L87 Difference]: Start difference. First operand 11250 states and 43092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:43,862 INFO L93 Difference]: Finished difference Result 20939 states and 73944 transitions. [2021-07-09 18:46:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:46:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:46:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:43,917 INFO L225 Difference]: With dead ends: 20939 [2021-07-09 18:46:43,917 INFO L226 Difference]: Without dead ends: 20903 [2021-07-09 18:46:43,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:46:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2021-07-09 18:46:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 11290. [2021-07-09 18:46:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11290 states, 11289 states have (on average 3.8302772610505804) internal successors, (43240), 11289 states have internal predecessors, (43240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 43240 transitions. [2021-07-09 18:46:44,428 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 43240 transitions. Word has length 28 [2021-07-09 18:46:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:44,429 INFO L482 AbstractCegarLoop]: Abstraction has 11290 states and 43240 transitions. [2021-07-09 18:46:44,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:46:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 43240 transitions. [2021-07-09 18:46:44,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:44,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:44,448 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:44,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,664 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 90 times [2021-07-09 18:46:44,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:44,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774317706] [2021-07-09 18:46:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774317706] [2021-07-09 18:46:44,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774317706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342614580] [2021-07-09 18:46:44,700 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:46:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342614580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:44,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:46:44,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471233039] [2021-07-09 18:46:44,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:44,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:44,812 INFO L87 Difference]: Start difference. First operand 11290 states and 43240 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:46,308 INFO L93 Difference]: Finished difference Result 20726 states and 73402 transitions. [2021-07-09 18:46:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:46:46,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:46,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:46,367 INFO L225 Difference]: With dead ends: 20726 [2021-07-09 18:46:46,367 INFO L226 Difference]: Without dead ends: 20726 [2021-07-09 18:46:46,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:46:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20726 states. [2021-07-09 18:46:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20726 to 11482. [2021-07-09 18:46:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11482 states, 11481 states have (on average 3.8212699242226287) internal successors, (43872), 11481 states have internal predecessors, (43872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11482 states to 11482 states and 43872 transitions. [2021-07-09 18:46:46,831 INFO L78 Accepts]: Start accepts. Automaton has 11482 states and 43872 transitions. Word has length 28 [2021-07-09 18:46:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:46,831 INFO L482 AbstractCegarLoop]: Abstraction has 11482 states and 43872 transitions. [2021-07-09 18:46:46,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 11482 states and 43872 transitions. [2021-07-09 18:46:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:46,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:46,852 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:47,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-07-09 18:46:47,068 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:47,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:47,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 91 times [2021-07-09 18:46:47,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:47,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619172951] [2021-07-09 18:46:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:47,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:47,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619172951] [2021-07-09 18:46:47,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619172951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:47,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888215007] [2021-07-09 18:46:47,104 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:47,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888215007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:47,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:47,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:46:47,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133527431] [2021-07-09 18:46:47,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:47,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:47,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:47,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:47,223 INFO L87 Difference]: Start difference. First operand 11482 states and 43872 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:48,475 INFO L93 Difference]: Finished difference Result 20187 states and 71933 transitions. [2021-07-09 18:46:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:46:48,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:48,531 INFO L225 Difference]: With dead ends: 20187 [2021-07-09 18:46:48,531 INFO L226 Difference]: Without dead ends: 20175 [2021-07-09 18:46:48,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:46:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20175 states. [2021-07-09 18:46:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20175 to 11366. [2021-07-09 18:46:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.825780906291245) internal successors, (43480), 11365 states have internal predecessors, (43480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 43480 transitions. [2021-07-09 18:46:48,985 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 43480 transitions. Word has length 28 [2021-07-09 18:46:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:48,985 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 43480 transitions. [2021-07-09 18:46:48,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 43480 transitions. [2021-07-09 18:46:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:49,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:49,008 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:49,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-09 18:46:49,221 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 92 times [2021-07-09 18:46:49,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:49,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791060941] [2021-07-09 18:46:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:49,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:49,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791060941] [2021-07-09 18:46:49,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791060941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:49,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817399642] [2021-07-09 18:46:49,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:49,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:49,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:49,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817399642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:49,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:49,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:46:49,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168140005] [2021-07-09 18:46:49,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:49,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:49,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:49,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:49,349 INFO L87 Difference]: Start difference. First operand 11366 states and 43480 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:50,342 INFO L93 Difference]: Finished difference Result 19429 states and 69858 transitions. [2021-07-09 18:46:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:46:50,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:50,409 INFO L225 Difference]: With dead ends: 19429 [2021-07-09 18:46:50,409 INFO L226 Difference]: Without dead ends: 19393 [2021-07-09 18:46:50,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:46:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2021-07-09 18:46:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 11390. [2021-07-09 18:46:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11390 states, 11389 states have (on average 3.8247431732373345) internal successors, (43560), 11389 states have internal predecessors, (43560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11390 states to 11390 states and 43560 transitions. [2021-07-09 18:46:50,799 INFO L78 Accepts]: Start accepts. Automaton has 11390 states and 43560 transitions. Word has length 28 [2021-07-09 18:46:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:50,800 INFO L482 AbstractCegarLoop]: Abstraction has 11390 states and 43560 transitions. [2021-07-09 18:46:50,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 11390 states and 43560 transitions. [2021-07-09 18:46:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:50,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:50,822 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:51,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-09 18:46:51,030 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:51,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 93 times [2021-07-09 18:46:51,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:51,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289963754] [2021-07-09 18:46:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:51,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:51,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289963754] [2021-07-09 18:46:51,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289963754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:51,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655301915] [2021-07-09 18:46:51,082 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:51,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:46:51,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:51,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:51,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:51,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655301915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:51,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:51,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:46:51,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51456753] [2021-07-09 18:46:51,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:51,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:51,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:51,203 INFO L87 Difference]: Start difference. First operand 11390 states and 43560 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:46:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:52,545 INFO L93 Difference]: Finished difference Result 28523 states and 101952 transitions. [2021-07-09 18:46:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:46:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:46:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:52,640 INFO L225 Difference]: With dead ends: 28523 [2021-07-09 18:46:52,640 INFO L226 Difference]: Without dead ends: 28523 [2021-07-09 18:46:52,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:46:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28523 states. [2021-07-09 18:46:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28523 to 11724. [2021-07-09 18:46:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11724 states, 11723 states have (on average 3.850294293269641) internal successors, (45137), 11723 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11724 states to 11724 states and 45137 transitions. [2021-07-09 18:46:53,148 INFO L78 Accepts]: Start accepts. Automaton has 11724 states and 45137 transitions. Word has length 28 [2021-07-09 18:46:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:53,148 INFO L482 AbstractCegarLoop]: Abstraction has 11724 states and 45137 transitions. [2021-07-09 18:46:53,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:46:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 11724 states and 45137 transitions. [2021-07-09 18:46:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:53,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:53,170 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:53,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 18:46:53,386 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 94 times [2021-07-09 18:46:53,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:53,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934169702] [2021-07-09 18:46:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:53,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:53,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934169702] [2021-07-09 18:46:53,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934169702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:53,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535355716] [2021-07-09 18:46:53,417 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:53,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:53,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535355716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:53,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:53,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:46:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451956322] [2021-07-09 18:46:53,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:53,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:53,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:53,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:53,533 INFO L87 Difference]: Start difference. First operand 11724 states and 45137 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:46:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:54,943 INFO L93 Difference]: Finished difference Result 27968 states and 100678 transitions. [2021-07-09 18:46:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:46:54,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:46:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:55,025 INFO L225 Difference]: With dead ends: 27968 [2021-07-09 18:46:55,025 INFO L226 Difference]: Without dead ends: 27968 [2021-07-09 18:46:55,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 866.0ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:46:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27968 states. [2021-07-09 18:46:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27968 to 11614. [2021-07-09 18:46:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11614 states, 11613 states have (on average 3.837595797812796) internal successors, (44566), 11613 states have internal predecessors, (44566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11614 states to 11614 states and 44566 transitions. [2021-07-09 18:46:55,523 INFO L78 Accepts]: Start accepts. Automaton has 11614 states and 44566 transitions. Word has length 28 [2021-07-09 18:46:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:55,524 INFO L482 AbstractCegarLoop]: Abstraction has 11614 states and 44566 transitions. [2021-07-09 18:46:55,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:46:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11614 states and 44566 transitions. [2021-07-09 18:46:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:55,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:55,543 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:55,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-09 18:46:55,759 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 95 times [2021-07-09 18:46:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:55,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755996808] [2021-07-09 18:46:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:55,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:55,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755996808] [2021-07-09 18:46:55,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755996808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:55,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767678566] [2021-07-09 18:46:55,801 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:55,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:46:55,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:55,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:55,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767678566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:55,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:55,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:46:55,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131003266] [2021-07-09 18:46:55,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:55,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:55,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:55,915 INFO L87 Difference]: Start difference. First operand 11614 states and 44566 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:56,957 INFO L93 Difference]: Finished difference Result 22124 states and 79964 transitions. [2021-07-09 18:46:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:46:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:57,040 INFO L225 Difference]: With dead ends: 22124 [2021-07-09 18:46:57,040 INFO L226 Difference]: Without dead ends: 22124 [2021-07-09 18:46:57,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:46:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22124 states. [2021-07-09 18:46:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22124 to 11623. [2021-07-09 18:46:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11623 states, 11622 states have (on average 3.8366029943211153) internal successors, (44589), 11622 states have internal predecessors, (44589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11623 states to 11623 states and 44589 transitions. [2021-07-09 18:46:57,447 INFO L78 Accepts]: Start accepts. Automaton has 11623 states and 44589 transitions. Word has length 28 [2021-07-09 18:46:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:57,447 INFO L482 AbstractCegarLoop]: Abstraction has 11623 states and 44589 transitions. [2021-07-09 18:46:57,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 11623 states and 44589 transitions. [2021-07-09 18:46:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:57,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:57,467 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:57,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:57,681 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-07-09 18:46:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:57,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463944814] [2021-07-09 18:46:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:57,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:57,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463944814] [2021-07-09 18:46:57,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463944814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159735126] [2021-07-09 18:46:57,739 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:57,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:46:57,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159735126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:57,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:46:57,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668462011] [2021-07-09 18:46:57,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:46:57,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:57,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:46:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:46:57,884 INFO L87 Difference]: Start difference. First operand 11623 states and 44589 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:58,670 INFO L93 Difference]: Finished difference Result 20483 states and 74724 transitions. [2021-07-09 18:46:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:46:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:46:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:58,733 INFO L225 Difference]: With dead ends: 20483 [2021-07-09 18:46:58,733 INFO L226 Difference]: Without dead ends: 20483 [2021-07-09 18:46:58,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:46:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-07-09 18:46:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 11635. [2021-07-09 18:46:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.8359119821213685) internal successors, (44627), 11634 states have internal predecessors, (44627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 44627 transitions. [2021-07-09 18:46:59,117 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 44627 transitions. Word has length 28 [2021-07-09 18:46:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:59,118 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 44627 transitions. [2021-07-09 18:46:59,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:46:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 44627 transitions. [2021-07-09 18:46:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:46:59,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:59,139 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:46:59,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-07-09 18:46:59,339 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-07-09 18:46:59,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:59,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434122664] [2021-07-09 18:46:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:46:59,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:59,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434122664] [2021-07-09 18:46:59,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434122664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:59,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103504064] [2021-07-09 18:46:59,400 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:46:59,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:59,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103504064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:59,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:59,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:46:59,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614098038] [2021-07-09 18:46:59,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:46:59,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:59,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:46:59,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:46:59,541 INFO L87 Difference]: Start difference. First operand 11635 states and 44627 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:00,706 INFO L93 Difference]: Finished difference Result 21266 states and 76961 transitions. [2021-07-09 18:47:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:47:00,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:00,771 INFO L225 Difference]: With dead ends: 21266 [2021-07-09 18:47:00,771 INFO L226 Difference]: Without dead ends: 21266 [2021-07-09 18:47:00,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 774.5ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:47:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21266 states. [2021-07-09 18:47:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21266 to 11743. [2021-07-09 18:47:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 3.8290751149718956) internal successors, (44961), 11742 states have internal predecessors, (44961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 44961 transitions. [2021-07-09 18:47:01,168 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 44961 transitions. Word has length 28 [2021-07-09 18:47:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:01,168 INFO L482 AbstractCegarLoop]: Abstraction has 11743 states and 44961 transitions. [2021-07-09 18:47:01,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 44961 transitions. [2021-07-09 18:47:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:01,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:01,189 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:01,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:01,405 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-07-09 18:47:01,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:01,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316995116] [2021-07-09 18:47:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:01,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:01,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316995116] [2021-07-09 18:47:01,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316995116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359050296] [2021-07-09 18:47:01,437 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:01,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:01,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:01,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359050296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:01,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:47:01,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708660868] [2021-07-09 18:47:01,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:01,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:01,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:01,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:01,549 INFO L87 Difference]: Start difference. First operand 11743 states and 44961 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:02,566 INFO L93 Difference]: Finished difference Result 20647 states and 75257 transitions. [2021-07-09 18:47:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:47:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:02,628 INFO L225 Difference]: With dead ends: 20647 [2021-07-09 18:47:02,628 INFO L226 Difference]: Without dead ends: 20643 [2021-07-09 18:47:02,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:47:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20643 states. [2021-07-09 18:47:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20643 to 11669. [2021-07-09 18:47:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.8328762427151184) internal successors, (44722), 11668 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44722 transitions. [2021-07-09 18:47:03,075 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44722 transitions. Word has length 28 [2021-07-09 18:47:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:03,075 INFO L482 AbstractCegarLoop]: Abstraction has 11669 states and 44722 transitions. [2021-07-09 18:47:03,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44722 transitions. [2021-07-09 18:47:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:03,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:03,095 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:03,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:03,311 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-07-09 18:47:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:03,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868920614] [2021-07-09 18:47:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:03,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:03,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868920614] [2021-07-09 18:47:03,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868920614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:03,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737565481] [2021-07-09 18:47:03,355 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:03,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:47:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:03,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737565481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:03,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:03,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:47:03,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368820608] [2021-07-09 18:47:03,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:03,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:03,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:03,510 INFO L87 Difference]: Start difference. First operand 11669 states and 44722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:04,647 INFO L93 Difference]: Finished difference Result 19952 states and 72022 transitions. [2021-07-09 18:47:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:47:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:04,703 INFO L225 Difference]: With dead ends: 19952 [2021-07-09 18:47:04,703 INFO L226 Difference]: Without dead ends: 19952 [2021-07-09 18:47:04,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 708.3ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:47:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2021-07-09 18:47:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 11896. [2021-07-09 18:47:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11896 states, 11895 states have (on average 3.8352248844052124) internal successors, (45620), 11895 states have internal predecessors, (45620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11896 states to 11896 states and 45620 transitions. [2021-07-09 18:47:05,077 INFO L78 Accepts]: Start accepts. Automaton has 11896 states and 45620 transitions. Word has length 28 [2021-07-09 18:47:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:05,077 INFO L482 AbstractCegarLoop]: Abstraction has 11896 states and 45620 transitions. [2021-07-09 18:47:05,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 11896 states and 45620 transitions. [2021-07-09 18:47:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:05,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:05,098 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:05,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-07-09 18:47:05,313 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-07-09 18:47:05,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:05,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802965925] [2021-07-09 18:47:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:05,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:05,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802965925] [2021-07-09 18:47:05,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802965925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:05,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953192817] [2021-07-09 18:47:05,350 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:05,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:05,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:05,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953192817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:05,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:05,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:47:05,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313977562] [2021-07-09 18:47:05,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:05,465 INFO L87 Difference]: Start difference. First operand 11896 states and 45620 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:06,457 INFO L93 Difference]: Finished difference Result 19483 states and 70731 transitions. [2021-07-09 18:47:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:47:06,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:06,513 INFO L225 Difference]: With dead ends: 19483 [2021-07-09 18:47:06,513 INFO L226 Difference]: Without dead ends: 19471 [2021-07-09 18:47:06,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:47:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19471 states. [2021-07-09 18:47:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19471 to 11998. [2021-07-09 18:47:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11998 states, 11997 states have (on average 3.8295407185129617) internal successors, (45943), 11997 states have internal predecessors, (45943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11998 states to 11998 states and 45943 transitions. [2021-07-09 18:47:06,860 INFO L78 Accepts]: Start accepts. Automaton has 11998 states and 45943 transitions. Word has length 28 [2021-07-09 18:47:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:06,860 INFO L482 AbstractCegarLoop]: Abstraction has 11998 states and 45943 transitions. [2021-07-09 18:47:06,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11998 states and 45943 transitions. [2021-07-09 18:47:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:06,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:06,886 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] [2021-07-09 18:47:07,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:07,103 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 77 times [2021-07-09 18:47:07,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:07,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334521121] [2021-07-09 18:47:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:07,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:07,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334521121] [2021-07-09 18:47:07,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334521121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:07,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096901400] [2021-07-09 18:47:07,139 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:07,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:47:07,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:07,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096901400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:07,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:07,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:47:07,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90191844] [2021-07-09 18:47:07,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:07,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:07,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:07,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:07,215 INFO L87 Difference]: Start difference. First operand 11998 states and 45943 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:07,647 INFO L93 Difference]: Finished difference Result 16918 states and 62875 transitions. [2021-07-09 18:47:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:47:07,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:07,692 INFO L225 Difference]: With dead ends: 16918 [2021-07-09 18:47:07,692 INFO L226 Difference]: Without dead ends: 16918 [2021-07-09 18:47:07,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:47:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2021-07-09 18:47:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 12070. [2021-07-09 18:47:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 12069 states have (on average 3.824923357361836) internal successors, (46163), 12069 states have internal predecessors, (46163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 46163 transitions. [2021-07-09 18:47:08,012 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 46163 transitions. Word has length 28 [2021-07-09 18:47:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:08,012 INFO L482 AbstractCegarLoop]: Abstraction has 12070 states and 46163 transitions. [2021-07-09 18:47:08,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 46163 transitions. [2021-07-09 18:47:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:08,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:08,034 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] [2021-07-09 18:47:08,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-09 18:47:08,248 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash -869150583, now seen corresponding path program 78 times [2021-07-09 18:47:08,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:08,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019018321] [2021-07-09 18:47:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:08,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019018321] [2021-07-09 18:47:08,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019018321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938092837] [2021-07-09 18:47:08,283 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:08,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:08,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:08,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:08,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:08,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938092837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:08,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:08,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:47:08,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580482335] [2021-07-09 18:47:08,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:08,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:08,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:08,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:08,392 INFO L87 Difference]: Start difference. First operand 12070 states and 46163 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-07-09 18:47:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:08,902 INFO L93 Difference]: Finished difference Result 15210 states and 56302 transitions. [2021-07-09 18:47:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:47:08,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-07-09 18:47:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:08,944 INFO L225 Difference]: With dead ends: 15210 [2021-07-09 18:47:08,945 INFO L226 Difference]: Without dead ends: 15169 [2021-07-09 18:47:08,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:47:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15169 states. [2021-07-09 18:47:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15169 to 11722. [2021-07-09 18:47:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11721 states have (on average 3.8192133776981487) internal successors, (44765), 11721 states have internal predecessors, (44765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 44765 transitions. [2021-07-09 18:47:09,217 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 44765 transitions. Word has length 28 [2021-07-09 18:47:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:09,217 INFO L482 AbstractCegarLoop]: Abstraction has 11722 states and 44765 transitions. [2021-07-09 18:47:09,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-07-09 18:47:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 44765 transitions. [2021-07-09 18:47:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:09,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:09,238 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] [2021-07-09 18:47:09,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-09 18:47:09,453 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 79 times [2021-07-09 18:47:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:09,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197729757] [2021-07-09 18:47:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:09,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197729757] [2021-07-09 18:47:09,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197729757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440321731] [2021-07-09 18:47:09,485 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:09,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440321731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:09,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:09,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:47:09,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74886414] [2021-07-09 18:47:09,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:09,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:09,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:09,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:09,566 INFO L87 Difference]: Start difference. First operand 11722 states and 44765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:10,058 INFO L93 Difference]: Finished difference Result 17574 states and 64350 transitions. [2021-07-09 18:47:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:47:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:10,106 INFO L225 Difference]: With dead ends: 17574 [2021-07-09 18:47:10,106 INFO L226 Difference]: Without dead ends: 17574 [2021-07-09 18:47:10,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:47:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17574 states. [2021-07-09 18:47:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17574 to 12034. [2021-07-09 18:47:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 12033 states have (on average 3.802626111526635) internal successors, (45757), 12033 states have internal predecessors, (45757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 45757 transitions. [2021-07-09 18:47:10,435 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 45757 transitions. Word has length 28 [2021-07-09 18:47:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:10,435 INFO L482 AbstractCegarLoop]: Abstraction has 12034 states and 45757 transitions. [2021-07-09 18:47:10,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 45757 transitions. [2021-07-09 18:47:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:10,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:10,458 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] [2021-07-09 18:47:10,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-09 18:47:10,673 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1138878323, now seen corresponding path program 80 times [2021-07-09 18:47:10,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:10,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201439382] [2021-07-09 18:47:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:10,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201439382] [2021-07-09 18:47:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201439382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454407229] [2021-07-09 18:47:10,702 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:10,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:10,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:10,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:10,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454407229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:10,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:10,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:47:10,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092200169] [2021-07-09 18:47:10,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:10,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:10,805 INFO L87 Difference]: Start difference. First operand 12034 states and 45757 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-07-09 18:47:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:11,319 INFO L93 Difference]: Finished difference Result 16784 states and 62443 transitions. [2021-07-09 18:47:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:47:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-07-09 18:47:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:11,364 INFO L225 Difference]: With dead ends: 16784 [2021-07-09 18:47:11,364 INFO L226 Difference]: Without dead ends: 16774 [2021-07-09 18:47:11,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-07-09 18:47:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 14052. [2021-07-09 18:47:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14052 states, 14051 states have (on average 3.8370222759945913) internal successors, (53914), 14051 states have internal predecessors, (53914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14052 states to 14052 states and 53914 transitions. [2021-07-09 18:47:11,682 INFO L78 Accepts]: Start accepts. Automaton has 14052 states and 53914 transitions. Word has length 28 [2021-07-09 18:47:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:11,682 INFO L482 AbstractCegarLoop]: Abstraction has 14052 states and 53914 transitions. [2021-07-09 18:47:11,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-07-09 18:47:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 14052 states and 53914 transitions. [2021-07-09 18:47:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:11,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:11,709 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] [2021-07-09 18:47:11,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 18:47:11,924 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 81 times [2021-07-09 18:47:11,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:11,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948496325] [2021-07-09 18:47:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:11,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:11,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948496325] [2021-07-09 18:47:11,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948496325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:11,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110317067] [2021-07-09 18:47:11,954 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:11,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:47:11,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:11,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110317067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:12,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:12,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:47:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868115983] [2021-07-09 18:47:12,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:12,056 INFO L87 Difference]: Start difference. First operand 14052 states and 53914 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:12,544 INFO L93 Difference]: Finished difference Result 19306 states and 72104 transitions. [2021-07-09 18:47:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:47:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:12,601 INFO L225 Difference]: With dead ends: 19306 [2021-07-09 18:47:12,601 INFO L226 Difference]: Without dead ends: 19298 [2021-07-09 18:47:12,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:47:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19298 states. [2021-07-09 18:47:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19298 to 13972. [2021-07-09 18:47:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13972 states, 13971 states have (on average 3.8398110371483787) internal successors, (53646), 13971 states have internal predecessors, (53646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13972 states to 13972 states and 53646 transitions. [2021-07-09 18:47:12,996 INFO L78 Accepts]: Start accepts. Automaton has 13972 states and 53646 transitions. Word has length 28 [2021-07-09 18:47:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:12,996 INFO L482 AbstractCegarLoop]: Abstraction has 13972 states and 53646 transitions. [2021-07-09 18:47:12,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 13972 states and 53646 transitions. [2021-07-09 18:47:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:13,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:13,020 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] [2021-07-09 18:47:13,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:13,235 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 82 times [2021-07-09 18:47:13,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:13,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676917552] [2021-07-09 18:47:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:13,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:13,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676917552] [2021-07-09 18:47:13,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676917552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:13,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160161876] [2021-07-09 18:47:13,273 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:13,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:13,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:13,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:13,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160161876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:13,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:13,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:47:13,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777272784] [2021-07-09 18:47:13,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:13,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:13,352 INFO L87 Difference]: Start difference. First operand 13972 states and 53646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:13,908 INFO L93 Difference]: Finished difference Result 19186 states and 71752 transitions. [2021-07-09 18:47:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:47:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:13,962 INFO L225 Difference]: With dead ends: 19186 [2021-07-09 18:47:13,962 INFO L226 Difference]: Without dead ends: 19174 [2021-07-09 18:47:13,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:47:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-07-09 18:47:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 13938. [2021-07-09 18:47:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13938 states, 13937 states have (on average 3.841788046207936) internal successors, (53543), 13937 states have internal predecessors, (53543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13938 states to 13938 states and 53543 transitions. [2021-07-09 18:47:14,337 INFO L78 Accepts]: Start accepts. Automaton has 13938 states and 53543 transitions. Word has length 28 [2021-07-09 18:47:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:14,337 INFO L482 AbstractCegarLoop]: Abstraction has 13938 states and 53543 transitions. [2021-07-09 18:47:14,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 13938 states and 53543 transitions. [2021-07-09 18:47:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:14,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:14,368 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] [2021-07-09 18:47:14,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-07-09 18:47:14,584 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 83 times [2021-07-09 18:47:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:14,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431630965] [2021-07-09 18:47:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:14,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431630965] [2021-07-09 18:47:14,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431630965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:14,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404133751] [2021-07-09 18:47:14,617 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:14,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:47:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:14,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:14,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404133751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:14,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:14,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:47:14,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726620825] [2021-07-09 18:47:14,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:47:14,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:14,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:47:14,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:47:14,722 INFO L87 Difference]: Start difference. First operand 13938 states and 53543 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:15,671 INFO L93 Difference]: Finished difference Result 26084 states and 94333 transitions. [2021-07-09 18:47:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:47:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:15,767 INFO L225 Difference]: With dead ends: 26084 [2021-07-09 18:47:15,767 INFO L226 Difference]: Without dead ends: 26084 [2021-07-09 18:47:15,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:47:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26084 states. [2021-07-09 18:47:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26084 to 13918. [2021-07-09 18:47:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 3.840698426384997) internal successors, (53451), 13917 states have internal predecessors, (53451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 53451 transitions. [2021-07-09 18:47:16,412 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 53451 transitions. Word has length 28 [2021-07-09 18:47:16,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:16,412 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 53451 transitions. [2021-07-09 18:47:16,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 53451 transitions. [2021-07-09 18:47:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:16,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:16,439 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] [2021-07-09 18:47:16,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-07-09 18:47:16,653 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 101 times [2021-07-09 18:47:16,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:16,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501967398] [2021-07-09 18:47:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:16,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:16,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501967398] [2021-07-09 18:47:16,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501967398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:16,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228697975] [2021-07-09 18:47:16,677 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:16,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:47:16,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:16,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:16,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228697975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:16,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:16,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:47:16,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111447452] [2021-07-09 18:47:16,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:47:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:47:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:16,777 INFO L87 Difference]: Start difference. First operand 13918 states and 53451 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:17,528 INFO L93 Difference]: Finished difference Result 21840 states and 79850 transitions. [2021-07-09 18:47:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:47:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:17,593 INFO L225 Difference]: With dead ends: 21840 [2021-07-09 18:47:17,593 INFO L226 Difference]: Without dead ends: 21827 [2021-07-09 18:47:17,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:47:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21827 states. [2021-07-09 18:47:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21827 to 15432. [2021-07-09 18:47:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15432 states, 15431 states have (on average 3.899293629706435) internal successors, (60170), 15431 states have internal predecessors, (60170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15432 states to 15432 states and 60170 transitions. [2021-07-09 18:47:18,055 INFO L78 Accepts]: Start accepts. Automaton has 15432 states and 60170 transitions. Word has length 28 [2021-07-09 18:47:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:18,055 INFO L482 AbstractCegarLoop]: Abstraction has 15432 states and 60170 transitions. [2021-07-09 18:47:18,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 15432 states and 60170 transitions. [2021-07-09 18:47:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:18,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:18,084 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] [2021-07-09 18:47:18,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-09 18:47:18,300 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 102 times [2021-07-09 18:47:18,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:18,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311969603] [2021-07-09 18:47:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:18,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:18,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311969603] [2021-07-09 18:47:18,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311969603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:18,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126669616] [2021-07-09 18:47:18,325 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:18,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:18,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126669616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:18,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:18,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:47:18,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597154130] [2021-07-09 18:47:18,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:47:18,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:18,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:47:18,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:18,429 INFO L87 Difference]: Start difference. First operand 15432 states and 60170 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:19,345 INFO L93 Difference]: Finished difference Result 22001 states and 80297 transitions. [2021-07-09 18:47:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:47:19,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:19,409 INFO L225 Difference]: With dead ends: 22001 [2021-07-09 18:47:19,409 INFO L226 Difference]: Without dead ends: 21986 [2021-07-09 18:47:19,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:47:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2021-07-09 18:47:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 15399. [2021-07-09 18:47:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 3.89829848032212) internal successors, (60026), 15398 states have internal predecessors, (60026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 60026 transitions. [2021-07-09 18:47:19,836 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 60026 transitions. Word has length 28 [2021-07-09 18:47:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:19,836 INFO L482 AbstractCegarLoop]: Abstraction has 15399 states and 60026 transitions. [2021-07-09 18:47:19,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 60026 transitions. [2021-07-09 18:47:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:19,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:19,864 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] [2021-07-09 18:47:20,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:20,079 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:20,080 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 103 times [2021-07-09 18:47:20,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:20,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312319192] [2021-07-09 18:47:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:20,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312319192] [2021-07-09 18:47:20,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312319192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811531031] [2021-07-09 18:47:20,105 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:20,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:20,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811531031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:20,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:20,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:47:20,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246187656] [2021-07-09 18:47:20,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:20,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:20,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:20,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:20,201 INFO L87 Difference]: Start difference. First operand 15399 states and 60026 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:47:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:20,897 INFO L93 Difference]: Finished difference Result 25011 states and 91344 transitions. [2021-07-09 18:47:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:47:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:47:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:20,972 INFO L225 Difference]: With dead ends: 25011 [2021-07-09 18:47:20,972 INFO L226 Difference]: Without dead ends: 24998 [2021-07-09 18:47:20,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:47:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2021-07-09 18:47:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 15493. [2021-07-09 18:47:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15493 states, 15492 states have (on average 3.904014975471211) internal successors, (60481), 15492 states have internal predecessors, (60481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15493 states to 15493 states and 60481 transitions. [2021-07-09 18:47:21,638 INFO L78 Accepts]: Start accepts. Automaton has 15493 states and 60481 transitions. Word has length 28 [2021-07-09 18:47:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:21,638 INFO L482 AbstractCegarLoop]: Abstraction has 15493 states and 60481 transitions. [2021-07-09 18:47:21,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:47:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 15493 states and 60481 transitions. [2021-07-09 18:47:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:21,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:21,675 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] [2021-07-09 18:47:21,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:21,892 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:21,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-07-09 18:47:21,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:21,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748312877] [2021-07-09 18:47:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:21,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:21,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748312877] [2021-07-09 18:47:21,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748312877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:21,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141174662] [2021-07-09 18:47:21,919 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:21,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:21,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:21,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:21,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:22,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141174662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:22,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:22,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:47:22,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722423714] [2021-07-09 18:47:22,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:22,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:22,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:22,026 INFO L87 Difference]: Start difference. First operand 15493 states and 60481 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:47:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:22,741 INFO L93 Difference]: Finished difference Result 26795 states and 97004 transitions. [2021-07-09 18:47:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:47:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-09 18:47:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:22,838 INFO L225 Difference]: With dead ends: 26795 [2021-07-09 18:47:22,838 INFO L226 Difference]: Without dead ends: 26795 [2021-07-09 18:47:22,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:47:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26795 states. [2021-07-09 18:47:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26795 to 15546. [2021-07-09 18:47:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15546 states, 15545 states have (on average 3.900482470247668) internal successors, (60633), 15545 states have internal predecessors, (60633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 60633 transitions. [2021-07-09 18:47:23,363 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 60633 transitions. Word has length 28 [2021-07-09 18:47:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:23,363 INFO L482 AbstractCegarLoop]: Abstraction has 15546 states and 60633 transitions. [2021-07-09 18:47:23,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-07-09 18:47:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 60633 transitions. [2021-07-09 18:47:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:23,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:23,393 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] [2021-07-09 18:47:23,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:23,609 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 84 times [2021-07-09 18:47:23,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:23,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142863973] [2021-07-09 18:47:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:23,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142863973] [2021-07-09 18:47:23,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142863973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843349577] [2021-07-09 18:47:23,639 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:23,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:47:23,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:23,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843349577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:23,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:23,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:47:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345265578] [2021-07-09 18:47:23,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:47:23,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:47:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:23,737 INFO L87 Difference]: Start difference. First operand 15546 states and 60633 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:47:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:24,878 INFO L93 Difference]: Finished difference Result 26187 states and 97576 transitions. [2021-07-09 18:47:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:47:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-09 18:47:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:24,958 INFO L225 Difference]: With dead ends: 26187 [2021-07-09 18:47:24,959 INFO L226 Difference]: Without dead ends: 26183 [2021-07-09 18:47:24,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:47:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26183 states. [2021-07-09 18:47:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26183 to 15842. [2021-07-09 18:47:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 3.8898428129537277) internal successors, (61619), 15841 states have internal predecessors, (61619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 61619 transitions. [2021-07-09 18:47:25,439 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 61619 transitions. Word has length 28 [2021-07-09 18:47:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:25,439 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 61619 transitions. [2021-07-09 18:47:25,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:47:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 61619 transitions. [2021-07-09 18:47:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:25,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:25,469 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] [2021-07-09 18:47:25,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:25,685 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:25,685 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 105 times [2021-07-09 18:47:25,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:25,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632286620] [2021-07-09 18:47:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:25,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:25,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632286620] [2021-07-09 18:47:25,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632286620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:25,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710602211] [2021-07-09 18:47:25,714 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:25,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:47:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:25,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710602211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:25,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:25,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:47:25,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490663936] [2021-07-09 18:47:25,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:25,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:25,810 INFO L87 Difference]: Start difference. First operand 15842 states and 61619 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:26,525 INFO L93 Difference]: Finished difference Result 23185 states and 86238 transitions. [2021-07-09 18:47:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:47:26,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:26,605 INFO L225 Difference]: With dead ends: 23185 [2021-07-09 18:47:26,605 INFO L226 Difference]: Without dead ends: 23162 [2021-07-09 18:47:26,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:47:26,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23162 states. [2021-07-09 18:47:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23162 to 15987. [2021-07-09 18:47:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15987 states, 15986 states have (on average 3.90191417490304) internal successors, (62376), 15986 states have internal predecessors, (62376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15987 states to 15987 states and 62376 transitions. [2021-07-09 18:47:27,059 INFO L78 Accepts]: Start accepts. Automaton has 15987 states and 62376 transitions. Word has length 28 [2021-07-09 18:47:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:27,060 INFO L482 AbstractCegarLoop]: Abstraction has 15987 states and 62376 transitions. [2021-07-09 18:47:27,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15987 states and 62376 transitions. [2021-07-09 18:47:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:27,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:27,091 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] [2021-07-09 18:47:27,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-09 18:47:27,308 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-07-09 18:47:27,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:27,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71124266] [2021-07-09 18:47:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:27,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:27,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71124266] [2021-07-09 18:47:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71124266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:27,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767345067] [2021-07-09 18:47:27,336 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:27,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:27,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767345067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:27,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:27,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:47:27,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64039977] [2021-07-09 18:47:27,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:27,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:27,427 INFO L87 Difference]: Start difference. First operand 15987 states and 62376 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:28,153 INFO L93 Difference]: Finished difference Result 22747 states and 83421 transitions. [2021-07-09 18:47:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:47:28,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:28,214 INFO L225 Difference]: With dead ends: 22747 [2021-07-09 18:47:28,215 INFO L226 Difference]: Without dead ends: 22747 [2021-07-09 18:47:28,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:47:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2021-07-09 18:47:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 16102. [2021-07-09 18:47:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16102 states, 16101 states have (on average 3.8941059561517917) internal successors, (62699), 16101 states have internal predecessors, (62699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16102 states to 16102 states and 62699 transitions. [2021-07-09 18:47:28,672 INFO L78 Accepts]: Start accepts. Automaton has 16102 states and 62699 transitions. Word has length 28 [2021-07-09 18:47:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:28,672 INFO L482 AbstractCegarLoop]: Abstraction has 16102 states and 62699 transitions. [2021-07-09 18:47:28,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16102 states and 62699 transitions. [2021-07-09 18:47:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:28,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:28,700 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] [2021-07-09 18:47:28,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-09 18:47:28,916 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:28,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-07-09 18:47:28,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:28,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056799117] [2021-07-09 18:47:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:28,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:28,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056799117] [2021-07-09 18:47:28,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056799117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:28,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028641413] [2021-07-09 18:47:28,944 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:47:28,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:47:28,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028641413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:29,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:29,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:47:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872510312] [2021-07-09 18:47:29,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:47:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:47:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:47:29,040 INFO L87 Difference]: Start difference. First operand 16102 states and 62699 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:29,767 INFO L93 Difference]: Finished difference Result 25248 states and 92992 transitions. [2021-07-09 18:47:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:47:29,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:29,852 INFO L225 Difference]: With dead ends: 25248 [2021-07-09 18:47:29,852 INFO L226 Difference]: Without dead ends: 25248 [2021-07-09 18:47:29,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:47:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25248 states. [2021-07-09 18:47:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25248 to 17267. [2021-07-09 18:47:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17267 states, 17266 states have (on average 3.875709486852774) internal successors, (66918), 17266 states have internal predecessors, (66918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17267 states to 17267 states and 66918 transitions. [2021-07-09 18:47:30,471 INFO L78 Accepts]: Start accepts. Automaton has 17267 states and 66918 transitions. Word has length 28 [2021-07-09 18:47:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:30,471 INFO L482 AbstractCegarLoop]: Abstraction has 17267 states and 66918 transitions. [2021-07-09 18:47:30,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 17267 states and 66918 transitions. [2021-07-09 18:47:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:30,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:30,506 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] [2021-07-09 18:47:30,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 18:47:30,722 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-07-09 18:47:30,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:30,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892486350] [2021-07-09 18:47:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:30,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:30,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892486350] [2021-07-09 18:47:30,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892486350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:30,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985882075] [2021-07-09 18:47:30,754 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:30,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:47:30,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:30,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:30,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985882075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:30,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:30,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:47:30,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425030652] [2021-07-09 18:47:30,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:47:30,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:30,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:47:30,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:30,850 INFO L87 Difference]: Start difference. First operand 17267 states and 66918 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:47:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:31,701 INFO L93 Difference]: Finished difference Result 28557 states and 103702 transitions. [2021-07-09 18:47:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:47:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-09 18:47:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:31,795 INFO L225 Difference]: With dead ends: 28557 [2021-07-09 18:47:31,795 INFO L226 Difference]: Without dead ends: 28557 [2021-07-09 18:47:31,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:47:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2021-07-09 18:47:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 17513. [2021-07-09 18:47:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17513 states, 17512 states have (on average 3.8901324805847417) internal successors, (68124), 17512 states have internal predecessors, (68124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17513 states to 17513 states and 68124 transitions. [2021-07-09 18:47:32,329 INFO L78 Accepts]: Start accepts. Automaton has 17513 states and 68124 transitions. Word has length 28 [2021-07-09 18:47:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:32,329 INFO L482 AbstractCegarLoop]: Abstraction has 17513 states and 68124 transitions. [2021-07-09 18:47:32,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-07-09 18:47:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 17513 states and 68124 transitions. [2021-07-09 18:47:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:32,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:32,362 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] [2021-07-09 18:47:32,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-09 18:47:32,578 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:32,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:32,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 85 times [2021-07-09 18:47:32,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:32,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991081929] [2021-07-09 18:47:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:32,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:32,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991081929] [2021-07-09 18:47:32,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991081929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:32,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579583579] [2021-07-09 18:47:32,610 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:32,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:32,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579583579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:32,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:32,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:47:32,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237497778] [2021-07-09 18:47:32,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:32,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:32,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:32,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:32,762 INFO L87 Difference]: Start difference. First operand 17513 states and 68124 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:47:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:34,481 INFO L93 Difference]: Finished difference Result 45668 states and 165537 transitions. [2021-07-09 18:47:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:47:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:47:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:34,646 INFO L225 Difference]: With dead ends: 45668 [2021-07-09 18:47:34,647 INFO L226 Difference]: Without dead ends: 45668 [2021-07-09 18:47:34,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 988.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:47:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45668 states. [2021-07-09 18:47:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45668 to 18875. [2021-07-09 18:47:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18875 states, 18874 states have (on average 3.927943202288863) internal successors, (74136), 18874 states have internal predecessors, (74136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18875 states to 18875 states and 74136 transitions. [2021-07-09 18:47:35,594 INFO L78 Accepts]: Start accepts. Automaton has 18875 states and 74136 transitions. Word has length 28 [2021-07-09 18:47:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:35,595 INFO L482 AbstractCegarLoop]: Abstraction has 18875 states and 74136 transitions. [2021-07-09 18:47:35,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:47:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18875 states and 74136 transitions. [2021-07-09 18:47:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:35,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:35,628 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] [2021-07-09 18:47:35,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:35,844 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 86 times [2021-07-09 18:47:35,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:35,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871347250] [2021-07-09 18:47:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:35,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:35,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871347250] [2021-07-09 18:47:35,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871347250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:35,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456041289] [2021-07-09 18:47:35,876 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:35,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:35,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:35,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:36,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456041289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:36,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:36,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:47:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170009440] [2021-07-09 18:47:36,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:36,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:36,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:36,010 INFO L87 Difference]: Start difference. First operand 18875 states and 74136 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:47:37,114 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-09 18:47:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:37,753 INFO L93 Difference]: Finished difference Result 44591 states and 162736 transitions. [2021-07-09 18:47:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:47:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:47:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:37,932 INFO L225 Difference]: With dead ends: 44591 [2021-07-09 18:47:37,932 INFO L226 Difference]: Without dead ends: 44591 [2021-07-09 18:47:37,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 1046.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:47:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44591 states. [2021-07-09 18:47:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44591 to 18843. [2021-07-09 18:47:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 3.924848742171744) internal successors, (73952), 18842 states have internal predecessors, (73952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 73952 transitions. [2021-07-09 18:47:38,840 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 73952 transitions. Word has length 28 [2021-07-09 18:47:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:38,840 INFO L482 AbstractCegarLoop]: Abstraction has 18843 states and 73952 transitions. [2021-07-09 18:47:38,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:47:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 73952 transitions. [2021-07-09 18:47:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:38,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:38,876 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] [2021-07-09 18:47:39,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-07-09 18:47:39,092 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-07-09 18:47:39,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:39,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987757290] [2021-07-09 18:47:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:39,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:39,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987757290] [2021-07-09 18:47:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987757290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:39,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884348870] [2021-07-09 18:47:39,123 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:39,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884348870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:39,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:39,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:47:39,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289321870] [2021-07-09 18:47:39,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:47:39,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:47:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:47:39,194 INFO L87 Difference]: Start difference. First operand 18843 states and 73952 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:47:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:39,559 INFO L93 Difference]: Finished difference Result 30303 states and 117561 transitions. [2021-07-09 18:47:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:47:39,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-09 18:47:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:39,668 INFO L225 Difference]: With dead ends: 30303 [2021-07-09 18:47:39,668 INFO L226 Difference]: Without dead ends: 30256 [2021-07-09 18:47:39,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:47:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30256 states. [2021-07-09 18:47:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30256 to 24046. [2021-07-09 18:47:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24046 states, 24045 states have (on average 3.9271782075275525) internal successors, (94429), 24045 states have internal predecessors, (94429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24046 states to 24046 states and 94429 transitions. [2021-07-09 18:47:40,539 INFO L78 Accepts]: Start accepts. Automaton has 24046 states and 94429 transitions. Word has length 28 [2021-07-09 18:47:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:40,539 INFO L482 AbstractCegarLoop]: Abstraction has 24046 states and 94429 transitions. [2021-07-09 18:47:40,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:47:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24046 states and 94429 transitions. [2021-07-09 18:47:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:40,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:40,585 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] [2021-07-09 18:47:40,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-07-09 18:47:40,801 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-07-09 18:47:40,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:40,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205238871] [2021-07-09 18:47:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:40,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:40,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205238871] [2021-07-09 18:47:40,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205238871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:40,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291059435] [2021-07-09 18:47:40,826 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:40,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:40,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:40,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:47:40,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:40,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291059435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:40,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:40,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:47:40,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004253840] [2021-07-09 18:47:40,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:47:40,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:40,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:47:40,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:47:40,907 INFO L87 Difference]: Start difference. First operand 24046 states and 94429 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:47:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:41,188 INFO L93 Difference]: Finished difference Result 26794 states and 102777 transitions. [2021-07-09 18:47:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:47:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:47:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:41,275 INFO L225 Difference]: With dead ends: 26794 [2021-07-09 18:47:41,275 INFO L226 Difference]: Without dead ends: 26794 [2021-07-09 18:47:41,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:47:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-07-09 18:47:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 23549. [2021-07-09 18:47:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23549 states, 23548 states have (on average 3.9178274163410904) internal successors, (92257), 23548 states have internal predecessors, (92257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23549 states to 23549 states and 92257 transitions. [2021-07-09 18:47:42,226 INFO L78 Accepts]: Start accepts. Automaton has 23549 states and 92257 transitions. Word has length 28 [2021-07-09 18:47:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:42,226 INFO L482 AbstractCegarLoop]: Abstraction has 23549 states and 92257 transitions. [2021-07-09 18:47:42,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:47:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 23549 states and 92257 transitions. [2021-07-09 18:47:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:42,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:42,276 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:42,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-07-09 18:47:42,487 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-07-09 18:47:42,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:42,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45277576] [2021-07-09 18:47:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:42,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45277576] [2021-07-09 18:47:42,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45277576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59970755] [2021-07-09 18:47:42,521 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:42,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:47:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:42,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:42,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59970755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:42,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:42,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:47:42,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934165255] [2021-07-09 18:47:42,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:47:42,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:42,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:47:42,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:47:42,633 INFO L87 Difference]: Start difference. First operand 23549 states and 92257 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:43,632 INFO L93 Difference]: Finished difference Result 36148 states and 135030 transitions. [2021-07-09 18:47:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:47:43,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-07-09 18:47:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:43,825 INFO L225 Difference]: With dead ends: 36148 [2021-07-09 18:47:43,825 INFO L226 Difference]: Without dead ends: 36148 [2021-07-09 18:47:43,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:47:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36148 states. [2021-07-09 18:47:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36148 to 23617. [2021-07-09 18:47:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23617 states, 23616 states have (on average 3.915989159891599) internal successors, (92480), 23616 states have internal predecessors, (92480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23617 states to 23617 states and 92480 transitions. [2021-07-09 18:47:44,630 INFO L78 Accepts]: Start accepts. Automaton has 23617 states and 92480 transitions. Word has length 28 [2021-07-09 18:47:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:44,630 INFO L482 AbstractCegarLoop]: Abstraction has 23617 states and 92480 transitions. [2021-07-09 18:47:44,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 23617 states and 92480 transitions. [2021-07-09 18:47:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:44,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:44,789 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:45,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:45,021 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-07-09 18:47:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477490929] [2021-07-09 18:47:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:45,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:45,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477490929] [2021-07-09 18:47:45,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477490929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:45,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261140079] [2021-07-09 18:47:45,058 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:45,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:45,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:45,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261140079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:45,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:45,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:47:45,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500724369] [2021-07-09 18:47:45,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:45,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:45,176 INFO L87 Difference]: Start difference. First operand 23617 states and 92480 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:46,842 INFO L93 Difference]: Finished difference Result 46617 states and 172038 transitions. [2021-07-09 18:47:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:47:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:47,010 INFO L225 Difference]: With dead ends: 46617 [2021-07-09 18:47:47,010 INFO L226 Difference]: Without dead ends: 46617 [2021-07-09 18:47:47,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 935.6ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:47:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46617 states. [2021-07-09 18:47:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46617 to 23616. [2021-07-09 18:47:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23616 states, 23615 states have (on average 3.9178488248994285) internal successors, (92520), 23615 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23616 states to 23616 states and 92520 transitions. [2021-07-09 18:47:48,222 INFO L78 Accepts]: Start accepts. Automaton has 23616 states and 92520 transitions. Word has length 28 [2021-07-09 18:47:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:48,223 INFO L482 AbstractCegarLoop]: Abstraction has 23616 states and 92520 transitions. [2021-07-09 18:47:48,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 23616 states and 92520 transitions. [2021-07-09 18:47:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:48,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:48,273 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:48,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:48,489 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-07-09 18:47:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:48,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866763] [2021-07-09 18:47:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:48,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:48,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866763] [2021-07-09 18:47:48,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:48,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138024820] [2021-07-09 18:47:48,523 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:48,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:47:48,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:48,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:48,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:48,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138024820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:48,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:48,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:47:48,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216498019] [2021-07-09 18:47:48,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:47:48,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:47:48,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:47:48,790 INFO L87 Difference]: Start difference. First operand 23616 states and 92520 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:50,530 INFO L93 Difference]: Finished difference Result 46345 states and 171695 transitions. [2021-07-09 18:47:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:47:50,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:50,710 INFO L225 Difference]: With dead ends: 46345 [2021-07-09 18:47:50,710 INFO L226 Difference]: Without dead ends: 46345 [2021-07-09 18:47:50,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:47:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46345 states. [2021-07-09 18:47:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46345 to 23400. [2021-07-09 18:47:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23400 states, 23399 states have (on average 3.9111927860164966) internal successors, (91518), 23399 states have internal predecessors, (91518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 91518 transitions. [2021-07-09 18:47:51,880 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 91518 transitions. Word has length 28 [2021-07-09 18:47:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:51,880 INFO L482 AbstractCegarLoop]: Abstraction has 23400 states and 91518 transitions. [2021-07-09 18:47:51,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 91518 transitions. [2021-07-09 18:47:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:51,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:51,919 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] [2021-07-09 18:47:52,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-07-09 18:47:52,135 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-07-09 18:47:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:52,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016367615] [2021-07-09 18:47:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:52,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:52,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016367615] [2021-07-09 18:47:52,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016367615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:52,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702980669] [2021-07-09 18:47:52,160 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:52,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:52,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:47:52,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702980669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:52,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:52,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:47:52,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637104673] [2021-07-09 18:47:52,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:47:52,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:52,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:47:52,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:47:52,234 INFO L87 Difference]: Start difference. First operand 23400 states and 91518 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:52,704 INFO L93 Difference]: Finished difference Result 35770 states and 134580 transitions. [2021-07-09 18:47:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:47:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:52,819 INFO L225 Difference]: With dead ends: 35770 [2021-07-09 18:47:52,820 INFO L226 Difference]: Without dead ends: 35753 [2021-07-09 18:47:52,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:47:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35753 states. [2021-07-09 18:47:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35753 to 23671. [2021-07-09 18:47:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23671 states, 23670 states have (on average 3.9156738487536966) internal successors, (92684), 23670 states have internal predecessors, (92684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23671 states to 23671 states and 92684 transitions. [2021-07-09 18:47:53,722 INFO L78 Accepts]: Start accepts. Automaton has 23671 states and 92684 transitions. Word has length 28 [2021-07-09 18:47:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:53,722 INFO L482 AbstractCegarLoop]: Abstraction has 23671 states and 92684 transitions. [2021-07-09 18:47:53,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 23671 states and 92684 transitions. [2021-07-09 18:47:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:53,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:53,768 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] [2021-07-09 18:47:53,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-07-09 18:47:53,983 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-07-09 18:47:53,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:53,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447171262] [2021-07-09 18:47:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:54,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447171262] [2021-07-09 18:47:54,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447171262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379800686] [2021-07-09 18:47:54,012 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:47:54,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:47:54,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379800686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:54,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:54,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:47:54,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687302215] [2021-07-09 18:47:54,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:47:54,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:54,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:47:54,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:47:54,091 INFO L87 Difference]: Start difference. First operand 23671 states and 92684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:54,657 INFO L93 Difference]: Finished difference Result 37952 states and 141497 transitions. [2021-07-09 18:47:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:47:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:54,775 INFO L225 Difference]: With dead ends: 37952 [2021-07-09 18:47:54,775 INFO L226 Difference]: Without dead ends: 37952 [2021-07-09 18:47:54,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:47:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37952 states. [2021-07-09 18:47:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37952 to 23340. [2021-07-09 18:47:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23340 states, 23339 states have (on average 3.903252067355071) internal successors, (91098), 23339 states have internal predecessors, (91098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23340 states to 23340 states and 91098 transitions. [2021-07-09 18:47:55,703 INFO L78 Accepts]: Start accepts. Automaton has 23340 states and 91098 transitions. Word has length 28 [2021-07-09 18:47:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:55,704 INFO L482 AbstractCegarLoop]: Abstraction has 23340 states and 91098 transitions. [2021-07-09 18:47:55,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 23340 states and 91098 transitions. [2021-07-09 18:47:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:55,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:55,750 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:55,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-09 18:47:55,966 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:55,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-07-09 18:47:55,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:55,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673938029] [2021-07-09 18:47:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:56,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:56,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673938029] [2021-07-09 18:47:56,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673938029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:56,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763829248] [2021-07-09 18:47:56,002 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:56,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:56,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:56,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:56,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763829248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:56,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:56,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:47:56,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446749571] [2021-07-09 18:47:56,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:47:56,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:56,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:47:56,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:56,102 INFO L87 Difference]: Start difference. First operand 23340 states and 91098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:56,712 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:47:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:57,062 INFO L93 Difference]: Finished difference Result 33275 states and 124927 transitions. [2021-07-09 18:47:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:47:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:57,161 INFO L225 Difference]: With dead ends: 33275 [2021-07-09 18:47:57,161 INFO L226 Difference]: Without dead ends: 33275 [2021-07-09 18:47:57,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 543.7ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:47:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33275 states. [2021-07-09 18:47:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33275 to 23388. [2021-07-09 18:47:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23388 states, 23387 states have (on average 3.9018258006584854) internal successors, (91252), 23387 states have internal predecessors, (91252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23388 states to 23388 states and 91252 transitions. [2021-07-09 18:47:58,013 INFO L78 Accepts]: Start accepts. Automaton has 23388 states and 91252 transitions. Word has length 28 [2021-07-09 18:47:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:58,013 INFO L482 AbstractCegarLoop]: Abstraction has 23388 states and 91252 transitions. [2021-07-09 18:47:58,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 23388 states and 91252 transitions. [2021-07-09 18:47:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:47:58,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:58,054 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:58,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-07-09 18:47:58,270 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-07-09 18:47:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:58,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062908119] [2021-07-09 18:47:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:58,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062908119] [2021-07-09 18:47:58,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062908119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134585706] [2021-07-09 18:47:58,304 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:58,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:47:58,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:47:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:47:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134585706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:58,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:58,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:47:58,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022548233] [2021-07-09 18:47:58,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:47:58,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:58,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:47:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:47:58,399 INFO L87 Difference]: Start difference. First operand 23388 states and 91252 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:59,610 INFO L93 Difference]: Finished difference Result 34959 states and 129812 transitions. [2021-07-09 18:47:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:47:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:47:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:59,757 INFO L225 Difference]: With dead ends: 34959 [2021-07-09 18:47:59,757 INFO L226 Difference]: Without dead ends: 34959 [2021-07-09 18:47:59,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:47:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34959 states. [2021-07-09 18:48:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34959 to 23950. [2021-07-09 18:48:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23950 states, 23949 states have (on average 3.882625579356132) internal successors, (92985), 23949 states have internal predecessors, (92985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23950 states to 23950 states and 92985 transitions. [2021-07-09 18:48:00,641 INFO L78 Accepts]: Start accepts. Automaton has 23950 states and 92985 transitions. Word has length 28 [2021-07-09 18:48:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:00,641 INFO L482 AbstractCegarLoop]: Abstraction has 23950 states and 92985 transitions. [2021-07-09 18:48:00,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23950 states and 92985 transitions. [2021-07-09 18:48:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:00,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:00,683 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:00,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-07-09 18:48:00,886 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-07-09 18:48:00,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:00,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71695521] [2021-07-09 18:48:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:00,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:00,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71695521] [2021-07-09 18:48:00,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71695521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:00,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334233389] [2021-07-09 18:48:00,918 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:00,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:00,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:00,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:01,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334233389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:01,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:01,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:48:01,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28114099] [2021-07-09 18:48:01,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:48:01,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:48:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:48:01,027 INFO L87 Difference]: Start difference. First operand 23950 states and 92985 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:02,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:02,128 INFO L93 Difference]: Finished difference Result 34019 states and 127355 transitions. [2021-07-09 18:48:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:48:02,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:02,459 INFO L225 Difference]: With dead ends: 34019 [2021-07-09 18:48:02,459 INFO L226 Difference]: Without dead ends: 34015 [2021-07-09 18:48:02,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:48:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34015 states. [2021-07-09 18:48:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34015 to 23842. [2021-07-09 18:48:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 23841 states have (on average 3.885113879451365) internal successors, (92625), 23841 states have internal predecessors, (92625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 92625 transitions. [2021-07-09 18:48:03,237 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 92625 transitions. Word has length 28 [2021-07-09 18:48:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:03,237 INFO L482 AbstractCegarLoop]: Abstraction has 23842 states and 92625 transitions. [2021-07-09 18:48:03,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 92625 transitions. [2021-07-09 18:48:03,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:03,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:03,285 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] [2021-07-09 18:48:03,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:03,501 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-07-09 18:48:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:03,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066746572] [2021-07-09 18:48:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:03,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:03,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066746572] [2021-07-09 18:48:03,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066746572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:03,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098431550] [2021-07-09 18:48:03,529 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:03,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:48:03,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:03,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:48:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:48:03,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098431550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:03,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:03,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:48:03,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356017304] [2021-07-09 18:48:03,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:48:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:03,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:48:03,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:48:03,606 INFO L87 Difference]: Start difference. First operand 23842 states and 92625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:03,978 INFO L93 Difference]: Finished difference Result 30199 states and 113195 transitions. [2021-07-09 18:48:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:48:03,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:04,071 INFO L225 Difference]: With dead ends: 30199 [2021-07-09 18:48:04,071 INFO L226 Difference]: Without dead ends: 30199 [2021-07-09 18:48:04,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:48:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2021-07-09 18:48:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 24152. [2021-07-09 18:48:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.87718935033746) internal successors, (93638), 24151 states have internal predecessors, (93638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 93638 transitions. [2021-07-09 18:48:04,755 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 93638 transitions. Word has length 28 [2021-07-09 18:48:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:04,755 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 93638 transitions. [2021-07-09 18:48:04,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 93638 transitions. [2021-07-09 18:48:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:04,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:04,797 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:05,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-09 18:48:05,014 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-07-09 18:48:05,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:05,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661958746] [2021-07-09 18:48:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:05,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661958746] [2021-07-09 18:48:05,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661958746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787779954] [2021-07-09 18:48:05,165 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:05,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:48:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:48:05,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787779954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:05,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:05,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:48:05,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828166781] [2021-07-09 18:48:05,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:48:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:48:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:48:05,251 INFO L87 Difference]: Start difference. First operand 24152 states and 93638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:06,334 INFO L93 Difference]: Finished difference Result 35046 states and 129747 transitions. [2021-07-09 18:48:06,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:48:06,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:06,434 INFO L225 Difference]: With dead ends: 35046 [2021-07-09 18:48:06,434 INFO L226 Difference]: Without dead ends: 35046 [2021-07-09 18:48:06,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:48:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35046 states. [2021-07-09 18:48:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35046 to 25935. [2021-07-09 18:48:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.8859026760237527) internal successors, (100777), 25934 states have internal predecessors, (100777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 100777 transitions. [2021-07-09 18:48:07,320 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 100777 transitions. Word has length 28 [2021-07-09 18:48:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:07,320 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 100777 transitions. [2021-07-09 18:48:07,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 100777 transitions. [2021-07-09 18:48:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:07,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:07,364 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:07,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-09 18:48:07,580 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-07-09 18:48:07,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:07,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928036981] [2021-07-09 18:48:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:07,840 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 18:48:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:07,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928036981] [2021-07-09 18:48:07,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928036981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898289204] [2021-07-09 18:48:07,841 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:48:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:48:07,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898289204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:07,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:07,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:48:07,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639791357] [2021-07-09 18:48:07,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:48:07,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:07,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:48:07,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:48:07,954 INFO L87 Difference]: Start difference. First operand 25935 states and 100777 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:08,690 INFO L93 Difference]: Finished difference Result 33305 states and 125259 transitions. [2021-07-09 18:48:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:48:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:08,975 INFO L225 Difference]: With dead ends: 33305 [2021-07-09 18:48:08,975 INFO L226 Difference]: Without dead ends: 33293 [2021-07-09 18:48:08,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:48:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33293 states. [2021-07-09 18:48:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33293 to 26101. [2021-07-09 18:48:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26101 states, 26100 states have (on average 3.880842911877395) internal successors, (101290), 26100 states have internal predecessors, (101290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26101 states to 26101 states and 101290 transitions. [2021-07-09 18:48:09,695 INFO L78 Accepts]: Start accepts. Automaton has 26101 states and 101290 transitions. Word has length 28 [2021-07-09 18:48:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:09,695 INFO L482 AbstractCegarLoop]: Abstraction has 26101 states and 101290 transitions. [2021-07-09 18:48:09,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 26101 states and 101290 transitions. [2021-07-09 18:48:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:09,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:09,741 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] [2021-07-09 18:48:09,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:09,956 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-07-09 18:48:09,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:09,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898696933] [2021-07-09 18:48:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:09,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:09,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898696933] [2021-07-09 18:48:09,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898696933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:09,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399499691] [2021-07-09 18:48:09,985 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:10,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:48:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:48:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:10,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399499691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:10,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:10,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:48:10,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387190160] [2021-07-09 18:48:10,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:48:10,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:48:10,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:48:10,058 INFO L87 Difference]: Start difference. First operand 26101 states and 101290 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:10,510 INFO L93 Difference]: Finished difference Result 30661 states and 116866 transitions. [2021-07-09 18:48:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:48:10,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:10,628 INFO L225 Difference]: With dead ends: 30661 [2021-07-09 18:48:10,628 INFO L226 Difference]: Without dead ends: 30661 [2021-07-09 18:48:10,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:48:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30661 states. [2021-07-09 18:48:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30661 to 27307. [2021-07-09 18:48:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27307 states, 27306 states have (on average 3.8768402548890353) internal successors, (105861), 27306 states have internal predecessors, (105861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27307 states to 27307 states and 105861 transitions. [2021-07-09 18:48:11,554 INFO L78 Accepts]: Start accepts. Automaton has 27307 states and 105861 transitions. Word has length 28 [2021-07-09 18:48:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:11,554 INFO L482 AbstractCegarLoop]: Abstraction has 27307 states and 105861 transitions. [2021-07-09 18:48:11,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 27307 states and 105861 transitions. [2021-07-09 18:48:11,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:11,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:11,610 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:11,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:11,826 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:11,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-07-09 18:48:11,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:11,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623445045] [2021-07-09 18:48:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:11,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:11,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623445045] [2021-07-09 18:48:11,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623445045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:11,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882341018] [2021-07-09 18:48:11,861 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:11,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:48:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:11,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:12,128 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:48:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882341018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:12,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:48:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103266719] [2021-07-09 18:48:12,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:48:12,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:48:12,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:48:12,137 INFO L87 Difference]: Start difference. First operand 27307 states and 105861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:12,944 INFO L93 Difference]: Finished difference Result 35422 states and 132065 transitions. [2021-07-09 18:48:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:48:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:13,219 INFO L225 Difference]: With dead ends: 35422 [2021-07-09 18:48:13,219 INFO L226 Difference]: Without dead ends: 35422 [2021-07-09 18:48:13,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:48:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-07-09 18:48:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28503. [2021-07-09 18:48:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28503 states, 28502 states have (on average 3.847694898603607) internal successors, (109667), 28502 states have internal predecessors, (109667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28503 states to 28503 states and 109667 transitions. [2021-07-09 18:48:14,020 INFO L78 Accepts]: Start accepts. Automaton has 28503 states and 109667 transitions. Word has length 28 [2021-07-09 18:48:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:14,020 INFO L482 AbstractCegarLoop]: Abstraction has 28503 states and 109667 transitions. [2021-07-09 18:48:14,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 28503 states and 109667 transitions. [2021-07-09 18:48:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:14,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:14,073 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:14,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:14,288 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:14,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:14,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-07-09 18:48:14,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:14,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794567215] [2021-07-09 18:48:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:14,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:14,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794567215] [2021-07-09 18:48:14,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794567215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:14,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549040285] [2021-07-09 18:48:14,319 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:14,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:14,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:14,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549040285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:14,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:14,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:48:14,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182106893] [2021-07-09 18:48:14,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:48:14,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:14,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:48:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:48:14,392 INFO L87 Difference]: Start difference. First operand 28503 states and 109667 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:15,201 INFO L93 Difference]: Finished difference Result 34544 states and 129722 transitions. [2021-07-09 18:48:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:48:15,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:15,296 INFO L225 Difference]: With dead ends: 34544 [2021-07-09 18:48:15,296 INFO L226 Difference]: Without dead ends: 34536 [2021-07-09 18:48:15,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:48:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34536 states. [2021-07-09 18:48:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34536 to 28309. [2021-07-09 18:48:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28308 states have (on average 3.853610286844708) internal successors, (109088), 28308 states have internal predecessors, (109088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 109088 transitions. [2021-07-09 18:48:16,294 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 109088 transitions. Word has length 28 [2021-07-09 18:48:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:16,294 INFO L482 AbstractCegarLoop]: Abstraction has 28309 states and 109088 transitions. [2021-07-09 18:48:16,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 109088 transitions. [2021-07-09 18:48:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:16,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:16,351 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:16,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:16,562 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-07-09 18:48:16,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:16,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429921857] [2021-07-09 18:48:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:16,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:16,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429921857] [2021-07-09 18:48:16,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429921857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:16,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092709539] [2021-07-09 18:48:16,593 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:16,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:48:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:16,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092709539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:16,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:16,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:48:16,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825656249] [2021-07-09 18:48:16,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:48:16,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:16,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:48:16,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:48:16,673 INFO L87 Difference]: Start difference. First operand 28309 states and 109088 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:17,562 INFO L93 Difference]: Finished difference Result 36390 states and 135344 transitions. [2021-07-09 18:48:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:48:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:17,673 INFO L225 Difference]: With dead ends: 36390 [2021-07-09 18:48:17,673 INFO L226 Difference]: Without dead ends: 36390 [2021-07-09 18:48:17,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:48:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36390 states. [2021-07-09 18:48:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36390 to 29319. [2021-07-09 18:48:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29319 states, 29318 states have (on average 3.831741592195921) internal successors, (112339), 29318 states have internal predecessors, (112339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29319 states to 29319 states and 112339 transitions. [2021-07-09 18:48:18,712 INFO L78 Accepts]: Start accepts. Automaton has 29319 states and 112339 transitions. Word has length 28 [2021-07-09 18:48:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:18,712 INFO L482 AbstractCegarLoop]: Abstraction has 29319 states and 112339 transitions. [2021-07-09 18:48:18,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 29319 states and 112339 transitions. [2021-07-09 18:48:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:18,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:18,770 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] [2021-07-09 18:48:18,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-07-09 18:48:18,985 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:18,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-07-09 18:48:18,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:18,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082854135] [2021-07-09 18:48:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:19,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:19,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082854135] [2021-07-09 18:48:19,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082854135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:19,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458043711] [2021-07-09 18:48:19,015 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:19,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:48:19,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:48:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:19,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458043711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:19,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:19,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:48:19,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272004938] [2021-07-09 18:48:19,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:48:19,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:48:19,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:48:19,084 INFO L87 Difference]: Start difference. First operand 29319 states and 112339 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:48:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:19,522 INFO L93 Difference]: Finished difference Result 35637 states and 135551 transitions. [2021-07-09 18:48:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:48:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:48:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:19,783 INFO L225 Difference]: With dead ends: 35637 [2021-07-09 18:48:19,783 INFO L226 Difference]: Without dead ends: 35624 [2021-07-09 18:48:19,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:48:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35624 states. [2021-07-09 18:48:20,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35624 to 34097. [2021-07-09 18:48:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34097 states, 34096 states have (on average 3.845964335992492) internal successors, (131132), 34096 states have internal predecessors, (131132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34097 states to 34097 states and 131132 transitions. [2021-07-09 18:48:20,589 INFO L78 Accepts]: Start accepts. Automaton has 34097 states and 131132 transitions. Word has length 28 [2021-07-09 18:48:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:20,589 INFO L482 AbstractCegarLoop]: Abstraction has 34097 states and 131132 transitions. [2021-07-09 18:48:20,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:48:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 34097 states and 131132 transitions. [2021-07-09 18:48:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:20,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:20,650 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] [2021-07-09 18:48:20,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:20,865 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-07-09 18:48:20,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:20,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075614016] [2021-07-09 18:48:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:20,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:20,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075614016] [2021-07-09 18:48:20,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075614016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:20,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945135866] [2021-07-09 18:48:20,895 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:48:20,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:20,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945135866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:20,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:20,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:48:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798885761] [2021-07-09 18:48:20,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:48:20,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:20,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:48:20,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:48:20,964 INFO L87 Difference]: Start difference. First operand 34097 states and 131132 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:48:21,135 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 18:48:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:21,569 INFO L93 Difference]: Finished difference Result 37254 states and 141034 transitions. [2021-07-09 18:48:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:48:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:48:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:21,690 INFO L225 Difference]: With dead ends: 37254 [2021-07-09 18:48:21,691 INFO L226 Difference]: Without dead ends: 37254 [2021-07-09 18:48:21,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:48:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37254 states. [2021-07-09 18:48:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37254 to 33774. [2021-07-09 18:48:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33774 states, 33773 states have (on average 3.8422704527285108) internal successors, (129765), 33773 states have internal predecessors, (129765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33774 states to 33774 states and 129765 transitions. [2021-07-09 18:48:22,743 INFO L78 Accepts]: Start accepts. Automaton has 33774 states and 129765 transitions. Word has length 28 [2021-07-09 18:48:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:22,743 INFO L482 AbstractCegarLoop]: Abstraction has 33774 states and 129765 transitions. [2021-07-09 18:48:22,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:48:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 33774 states and 129765 transitions. [2021-07-09 18:48:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:22,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:22,816 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:23,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-09 18:48:23,033 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:23,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:23,033 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-07-09 18:48:23,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:23,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379837969] [2021-07-09 18:48:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:23,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:23,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379837969] [2021-07-09 18:48:23,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379837969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:23,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243770987] [2021-07-09 18:48:23,061 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:23,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:48:23,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:23,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:23,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243770987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:23,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:23,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:48:23,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140049311] [2021-07-09 18:48:23,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:48:23,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:48:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:48:23,136 INFO L87 Difference]: Start difference. First operand 33774 states and 129765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:23,934 INFO L93 Difference]: Finished difference Result 40558 states and 152173 transitions. [2021-07-09 18:48:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:48:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:24,069 INFO L225 Difference]: With dead ends: 40558 [2021-07-09 18:48:24,070 INFO L226 Difference]: Without dead ends: 40550 [2021-07-09 18:48:24,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:48:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40550 states. [2021-07-09 18:48:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40550 to 33740. [2021-07-09 18:48:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33740 states, 33739 states have (on average 3.8426746495153976) internal successors, (129648), 33739 states have internal predecessors, (129648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33740 states to 33740 states and 129648 transitions. [2021-07-09 18:48:25,197 INFO L78 Accepts]: Start accepts. Automaton has 33740 states and 129648 transitions. Word has length 28 [2021-07-09 18:48:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:25,198 INFO L482 AbstractCegarLoop]: Abstraction has 33740 states and 129648 transitions. [2021-07-09 18:48:25,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 33740 states and 129648 transitions. [2021-07-09 18:48:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:25,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:25,258 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] [2021-07-09 18:48:25,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:25,473 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-07-09 18:48:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:25,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099342642] [2021-07-09 18:48:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:25,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:25,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099342642] [2021-07-09 18:48:25,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099342642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:25,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47581226] [2021-07-09 18:48:25,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:25,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:48:25,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:48:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47581226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:25,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:25,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:48:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531811330] [2021-07-09 18:48:25,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:48:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:25,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:48:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:48:25,569 INFO L87 Difference]: Start difference. First operand 33740 states and 129648 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:48:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:26,170 INFO L93 Difference]: Finished difference Result 36656 states and 139373 transitions. [2021-07-09 18:48:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:48:26,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-09 18:48:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:26,308 INFO L225 Difference]: With dead ends: 36656 [2021-07-09 18:48:26,308 INFO L226 Difference]: Without dead ends: 36656 [2021-07-09 18:48:26,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:48:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36656 states. [2021-07-09 18:48:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36656 to 34272. [2021-07-09 18:48:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34272 states, 34271 states have (on average 3.8409150593796504) internal successors, (131632), 34271 states have internal predecessors, (131632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34272 states to 34272 states and 131632 transitions. [2021-07-09 18:48:27,432 INFO L78 Accepts]: Start accepts. Automaton has 34272 states and 131632 transitions. Word has length 28 [2021-07-09 18:48:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:27,432 INFO L482 AbstractCegarLoop]: Abstraction has 34272 states and 131632 transitions. [2021-07-09 18:48:27,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-09 18:48:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34272 states and 131632 transitions. [2021-07-09 18:48:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:27,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:27,503 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:27,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-09 18:48:27,717 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-07-09 18:48:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:27,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032990298] [2021-07-09 18:48:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:27,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:27,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032990298] [2021-07-09 18:48:27,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032990298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:27,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97373854] [2021-07-09 18:48:27,748 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:27,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:27,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:48:27,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97373854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:27,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:27,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:48:27,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939010025] [2021-07-09 18:48:27,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:48:27,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:48:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:48:27,834 INFO L87 Difference]: Start difference. First operand 34272 states and 131632 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:28,647 INFO L93 Difference]: Finished difference Result 41443 states and 155515 transitions. [2021-07-09 18:48:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:48:28,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:28,815 INFO L225 Difference]: With dead ends: 41443 [2021-07-09 18:48:28,815 INFO L226 Difference]: Without dead ends: 41419 [2021-07-09 18:48:28,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:48:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41419 states. [2021-07-09 18:48:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41419 to 34444. [2021-07-09 18:48:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34444 states, 34443 states have (on average 3.8372383358011786) internal successors, (132166), 34443 states have internal predecessors, (132166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34444 states to 34444 states and 132166 transitions. [2021-07-09 18:48:29,781 INFO L78 Accepts]: Start accepts. Automaton has 34444 states and 132166 transitions. Word has length 28 [2021-07-09 18:48:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:29,781 INFO L482 AbstractCegarLoop]: Abstraction has 34444 states and 132166 transitions. [2021-07-09 18:48:29,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34444 states and 132166 transitions. [2021-07-09 18:48:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:30,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:30,027 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] [2021-07-09 18:48:30,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-09 18:48:30,238 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-07-09 18:48:30,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:30,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083884378] [2021-07-09 18:48:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:30,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:30,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083884378] [2021-07-09 18:48:30,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083884378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:30,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882457011] [2021-07-09 18:48:30,273 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:30,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:48:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:30,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:48:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:30,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882457011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:30,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:30,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 18:48:30,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493747378] [2021-07-09 18:48:30,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:48:30,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:48:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:48:30,347 INFO L87 Difference]: Start difference. First operand 34444 states and 132166 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:48:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:30,863 INFO L93 Difference]: Finished difference Result 37076 states and 140866 transitions. [2021-07-09 18:48:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:48:30,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-07-09 18:48:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:30,992 INFO L225 Difference]: With dead ends: 37076 [2021-07-09 18:48:30,993 INFO L226 Difference]: Without dead ends: 37076 [2021-07-09 18:48:30,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:48:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37076 states. [2021-07-09 18:48:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37076 to 34370. [2021-07-09 18:48:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34370 states, 34369 states have (on average 3.8380517326660653) internal successors, (131910), 34369 states have internal predecessors, (131910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34370 states to 34370 states and 131910 transitions. [2021-07-09 18:48:31,988 INFO L78 Accepts]: Start accepts. Automaton has 34370 states and 131910 transitions. Word has length 28 [2021-07-09 18:48:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:31,988 INFO L482 AbstractCegarLoop]: Abstraction has 34370 states and 131910 transitions. [2021-07-09 18:48:31,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-09 18:48:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 34370 states and 131910 transitions. [2021-07-09 18:48:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:32,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:32,050 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:32,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:32,254 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:32,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:32,254 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-07-09 18:48:32,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:32,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357454103] [2021-07-09 18:48:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:32,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:32,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357454103] [2021-07-09 18:48:32,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357454103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:32,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441134044] [2021-07-09 18:48:32,282 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:32,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:48:32,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:32,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441134044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:32,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:32,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:48:32,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180669541] [2021-07-09 18:48:32,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:48:32,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:48:32,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:48:32,348 INFO L87 Difference]: Start difference. First operand 34370 states and 131910 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:32,721 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 18:48:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:33,112 INFO L93 Difference]: Finished difference Result 41366 states and 155256 transitions. [2021-07-09 18:48:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:48:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:33,239 INFO L225 Difference]: With dead ends: 41366 [2021-07-09 18:48:33,239 INFO L226 Difference]: Without dead ends: 41326 [2021-07-09 18:48:33,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:48:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41326 states. [2021-07-09 18:48:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41326 to 34544. [2021-07-09 18:48:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34544 states, 34543 states have (on average 3.834264539848884) internal successors, (132447), 34543 states have internal predecessors, (132447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34544 states to 34544 states and 132447 transitions. [2021-07-09 18:48:34,324 INFO L78 Accepts]: Start accepts. Automaton has 34544 states and 132447 transitions. Word has length 28 [2021-07-09 18:48:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:34,324 INFO L482 AbstractCegarLoop]: Abstraction has 34544 states and 132447 transitions. [2021-07-09 18:48:34,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 34544 states and 132447 transitions. [2021-07-09 18:48:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:34,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:34,386 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:34,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable471 [2021-07-09 18:48:34,601 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:34,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-07-09 18:48:34,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:34,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887871316] [2021-07-09 18:48:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:34,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887871316] [2021-07-09 18:48:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887871316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:34,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073724697] [2021-07-09 18:48:34,630 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:34,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073724697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:34,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:34,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:48:34,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642721570] [2021-07-09 18:48:34,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:48:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:34,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:48:34,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:48:34,747 INFO L87 Difference]: Start difference. First operand 34544 states and 132447 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:48:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:36,555 INFO L93 Difference]: Finished difference Result 76905 states and 284650 transitions. [2021-07-09 18:48:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:48:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:48:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:36,854 INFO L225 Difference]: With dead ends: 76905 [2021-07-09 18:48:36,855 INFO L226 Difference]: Without dead ends: 76905 [2021-07-09 18:48:36,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:48:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76905 states. [2021-07-09 18:48:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76905 to 43639. [2021-07-09 18:48:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43639 states, 43638 states have (on average 3.908336770704432) internal successors, (170552), 43638 states have internal predecessors, (170552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43639 states to 43639 states and 170552 transitions. [2021-07-09 18:48:38,945 INFO L78 Accepts]: Start accepts. Automaton has 43639 states and 170552 transitions. Word has length 28 [2021-07-09 18:48:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:38,946 INFO L482 AbstractCegarLoop]: Abstraction has 43639 states and 170552 transitions. [2021-07-09 18:48:38,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:48:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 43639 states and 170552 transitions. [2021-07-09 18:48:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:39,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:39,028 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:39,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:39,241 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-07-09 18:48:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:39,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037072837] [2021-07-09 18:48:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:39,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:39,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037072837] [2021-07-09 18:48:39,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037072837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:39,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589693589] [2021-07-09 18:48:39,269 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:39,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:48:39,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:39,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:39,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589693589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:39,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:39,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:48:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799162284] [2021-07-09 18:48:39,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:48:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:48:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:48:39,396 INFO L87 Difference]: Start difference. First operand 43639 states and 170552 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:48:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:41,093 INFO L93 Difference]: Finished difference Result 76303 states and 283058 transitions. [2021-07-09 18:48:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:48:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-07-09 18:48:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:41,355 INFO L225 Difference]: With dead ends: 76303 [2021-07-09 18:48:41,355 INFO L226 Difference]: Without dead ends: 76303 [2021-07-09 18:48:41,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 658.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:48:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76303 states. [2021-07-09 18:48:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76303 to 43636. [2021-07-09 18:48:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43636 states, 43635 states have (on average 3.908284633894809) internal successors, (170538), 43635 states have internal predecessors, (170538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43636 states to 43636 states and 170538 transitions. [2021-07-09 18:48:43,236 INFO L78 Accepts]: Start accepts. Automaton has 43636 states and 170538 transitions. Word has length 28 [2021-07-09 18:48:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:43,237 INFO L482 AbstractCegarLoop]: Abstraction has 43636 states and 170538 transitions. [2021-07-09 18:48:43,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-07-09 18:48:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 43636 states and 170538 transitions. [2021-07-09 18:48:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:43,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:43,319 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:43,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:43,533 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-07-09 18:48:43,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:43,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439498222] [2021-07-09 18:48:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:43,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:43,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439498222] [2021-07-09 18:48:43,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439498222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:43,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863174804] [2021-07-09 18:48:43,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:43,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:48:43,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:43,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:43,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863174804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:43,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:43,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:48:43,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462918288] [2021-07-09 18:48:43,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:48:43,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:43,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:48:43,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:48:43,665 INFO L87 Difference]: Start difference. First operand 43636 states and 170538 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:45,141 INFO L93 Difference]: Finished difference Result 70919 states and 264966 transitions. [2021-07-09 18:48:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:48:45,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:45,401 INFO L225 Difference]: With dead ends: 70919 [2021-07-09 18:48:45,401 INFO L226 Difference]: Without dead ends: 70919 [2021-07-09 18:48:45,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:48:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70919 states. [2021-07-09 18:48:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70919 to 43660. [2021-07-09 18:48:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.9085182894706705) internal successors, (170642), 43659 states have internal predecessors, (170642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170642 transitions. [2021-07-09 18:48:47,306 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170642 transitions. Word has length 28 [2021-07-09 18:48:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:47,306 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170642 transitions. [2021-07-09 18:48:47,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170642 transitions. [2021-07-09 18:48:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:47,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:47,390 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:47,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-09 18:48:47,605 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-07-09 18:48:47,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:47,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270728678] [2021-07-09 18:48:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:47,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:47,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270728678] [2021-07-09 18:48:47,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270728678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:47,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239155571] [2021-07-09 18:48:47,634 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:47,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:47,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:47,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239155571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:47,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:47,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:48:47,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383064677] [2021-07-09 18:48:47,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:48:47,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:47,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:48:47,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:48:47,742 INFO L87 Difference]: Start difference. First operand 43660 states and 170642 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:49,073 INFO L93 Difference]: Finished difference Result 70043 states and 262701 transitions. [2021-07-09 18:48:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:48:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:49,585 INFO L225 Difference]: With dead ends: 70043 [2021-07-09 18:48:49,585 INFO L226 Difference]: Without dead ends: 70035 [2021-07-09 18:48:49,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:48:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70035 states. [2021-07-09 18:48:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70035 to 43660. [2021-07-09 18:48:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.908380860761813) internal successors, (170636), 43659 states have internal predecessors, (170636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170636 transitions. [2021-07-09 18:48:51,302 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170636 transitions. Word has length 28 [2021-07-09 18:48:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:51,302 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170636 transitions. [2021-07-09 18:48:51,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170636 transitions. [2021-07-09 18:48:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:51,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:51,603 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:51,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:51,804 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:51,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-07-09 18:48:51,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:51,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391696616] [2021-07-09 18:48:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:51,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:51,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391696616] [2021-07-09 18:48:51,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391696616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:51,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140963993] [2021-07-09 18:48:51,832 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:51,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:48:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:51,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:51,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140963993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:51,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:51,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:48:51,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130434543] [2021-07-09 18:48:51,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:48:51,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:51,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:48:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:48:51,951 INFO L87 Difference]: Start difference. First operand 43660 states and 170636 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:53,403 INFO L93 Difference]: Finished difference Result 69550 states and 261394 transitions. [2021-07-09 18:48:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:48:53,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:53,632 INFO L225 Difference]: With dead ends: 69550 [2021-07-09 18:48:53,632 INFO L226 Difference]: Without dead ends: 69550 [2021-07-09 18:48:53,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:48:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69550 states. [2021-07-09 18:48:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69550 to 43668. [2021-07-09 18:48:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908443446996588) internal successors, (170670), 43667 states have internal predecessors, (170670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170670 transitions. [2021-07-09 18:48:55,587 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170670 transitions. Word has length 28 [2021-07-09 18:48:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:55,587 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170670 transitions. [2021-07-09 18:48:55,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170670 transitions. [2021-07-09 18:48:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:55,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:55,666 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:55,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-07-09 18:48:55,881 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:55,881 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-07-09 18:48:55,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:55,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170320139] [2021-07-09 18:48:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:55,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:55,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170320139] [2021-07-09 18:48:55,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170320139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:55,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705152333] [2021-07-09 18:48:55,909 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:55,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:48:55,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:55,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:48:55,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:56,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705152333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:56,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:56,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:48:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339941213] [2021-07-09 18:48:56,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:48:56,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:56,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:48:56,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:48:56,015 INFO L87 Difference]: Start difference. First operand 43668 states and 170670 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:57,578 INFO L93 Difference]: Finished difference Result 69317 states and 260810 transitions. [2021-07-09 18:48:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:48:57,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:48:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:57,812 INFO L225 Difference]: With dead ends: 69317 [2021-07-09 18:48:57,812 INFO L226 Difference]: Without dead ends: 69309 [2021-07-09 18:48:57,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:48:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69309 states. [2021-07-09 18:48:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69309 to 43668. [2021-07-09 18:48:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908397645819498) internal successors, (170668), 43667 states have internal predecessors, (170668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170668 transitions. [2021-07-09 18:48:59,755 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170668 transitions. Word has length 28 [2021-07-09 18:48:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:59,755 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170668 transitions. [2021-07-09 18:48:59,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170668 transitions. [2021-07-09 18:48:59,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:48:59,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:59,841 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:00,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-09 18:49:00,049 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-07-09 18:49:00,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:00,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405687364] [2021-07-09 18:49:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:00,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405687364] [2021-07-09 18:49:00,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405687364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140761792] [2021-07-09 18:49:00,078 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:00,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140761792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:00,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:00,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:49:00,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302866961] [2021-07-09 18:49:00,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:00,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:00,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:00,173 INFO L87 Difference]: Start difference. First operand 43668 states and 170668 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:49:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:01,464 INFO L93 Difference]: Finished difference Result 68845 states and 257637 transitions. [2021-07-09 18:49:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:49:01,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:49:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:01,703 INFO L225 Difference]: With dead ends: 68845 [2021-07-09 18:49:01,703 INFO L226 Difference]: Without dead ends: 68845 [2021-07-09 18:49:01,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:49:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68845 states. [2021-07-09 18:49:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68845 to 46904. [2021-07-09 18:49:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46904 states, 46903 states have (on average 3.911754045583438) internal successors, (183473), 46903 states have internal predecessors, (183473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46904 states to 46904 states and 183473 transitions. [2021-07-09 18:49:03,558 INFO L78 Accepts]: Start accepts. Automaton has 46904 states and 183473 transitions. Word has length 28 [2021-07-09 18:49:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:03,558 INFO L482 AbstractCegarLoop]: Abstraction has 46904 states and 183473 transitions. [2021-07-09 18:49:03,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:49:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 46904 states and 183473 transitions. [2021-07-09 18:49:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:03,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:03,644 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:03,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-07-09 18:49:03,859 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:03,859 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-07-09 18:49:03,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:03,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037377046] [2021-07-09 18:49:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:03,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037377046] [2021-07-09 18:49:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037377046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270640811] [2021-07-09 18:49:03,889 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:04,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270640811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:04,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:04,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:49:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246130183] [2021-07-09 18:49:04,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:04,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:04,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:04,230 INFO L87 Difference]: Start difference. First operand 46904 states and 183473 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:49:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:05,498 INFO L93 Difference]: Finished difference Result 68346 states and 256324 transitions. [2021-07-09 18:49:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:49:05,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:49:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:05,761 INFO L225 Difference]: With dead ends: 68346 [2021-07-09 18:49:05,761 INFO L226 Difference]: Without dead ends: 68338 [2021-07-09 18:49:05,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:49:05,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68338 states. [2021-07-09 18:49:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68338 to 46598. [2021-07-09 18:49:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46598 states, 46597 states have (on average 3.917119127840848) internal successors, (182526), 46597 states have internal predecessors, (182526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46598 states to 46598 states and 182526 transitions. [2021-07-09 18:49:07,750 INFO L78 Accepts]: Start accepts. Automaton has 46598 states and 182526 transitions. Word has length 28 [2021-07-09 18:49:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:07,750 INFO L482 AbstractCegarLoop]: Abstraction has 46598 states and 182526 transitions. [2021-07-09 18:49:07,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:49:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 46598 states and 182526 transitions. [2021-07-09 18:49:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:07,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:07,835 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:08,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:08,049 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-07-09 18:49:08,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:08,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806068378] [2021-07-09 18:49:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:08,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806068378] [2021-07-09 18:49:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806068378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440363362] [2021-07-09 18:49:08,079 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:08,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:49:08,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:08,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440363362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:08,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:08,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:49:08,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713869897] [2021-07-09 18:49:08,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:08,189 INFO L87 Difference]: Start difference. First operand 46598 states and 182526 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:49:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:09,273 INFO L93 Difference]: Finished difference Result 66749 states and 251892 transitions. [2021-07-09 18:49:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:49:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-07-09 18:49:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:09,719 INFO L225 Difference]: With dead ends: 66749 [2021-07-09 18:49:09,719 INFO L226 Difference]: Without dead ends: 66725 [2021-07-09 18:49:09,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:49:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66725 states. [2021-07-09 18:49:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66725 to 46494. [2021-07-09 18:49:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46494 states, 46493 states have (on average 3.9171058008732498) internal successors, (182118), 46493 states have internal predecessors, (182118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46494 states to 46494 states and 182118 transitions. [2021-07-09 18:49:11,330 INFO L78 Accepts]: Start accepts. Automaton has 46494 states and 182118 transitions. Word has length 28 [2021-07-09 18:49:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:11,330 INFO L482 AbstractCegarLoop]: Abstraction has 46494 states and 182118 transitions. [2021-07-09 18:49:11,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-07-09 18:49:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 46494 states and 182118 transitions. [2021-07-09 18:49:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:11,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:11,429 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:11,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:11,644 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-07-09 18:49:11,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:11,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699131761] [2021-07-09 18:49:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:11,841 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 18:49:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:49:11,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:11,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699131761] [2021-07-09 18:49:11,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699131761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:11,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353345906] [2021-07-09 18:49:11,865 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:11,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:49:11,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:11,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353345906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:11,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:11,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:49:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509142484] [2021-07-09 18:49:11,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:49:11,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:49:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:49:11,979 INFO L87 Difference]: Start difference. First operand 46494 states and 182118 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:13,400 INFO L93 Difference]: Finished difference Result 67947 states and 255225 transitions. [2021-07-09 18:49:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:49:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:13,649 INFO L225 Difference]: With dead ends: 67947 [2021-07-09 18:49:13,649 INFO L226 Difference]: Without dead ends: 67947 [2021-07-09 18:49:13,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:49:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67947 states. [2021-07-09 18:49:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67947 to 46590. [2021-07-09 18:49:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46590 states, 46589 states have (on average 3.9157741097684005) internal successors, (182432), 46589 states have internal predecessors, (182432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46590 states to 46590 states and 182432 transitions. [2021-07-09 18:49:15,498 INFO L78 Accepts]: Start accepts. Automaton has 46590 states and 182432 transitions. Word has length 28 [2021-07-09 18:49:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:15,498 INFO L482 AbstractCegarLoop]: Abstraction has 46590 states and 182432 transitions. [2021-07-09 18:49:15,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 46590 states and 182432 transitions. [2021-07-09 18:49:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:15,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:15,583 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:15,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:15,785 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-07-09 18:49:15,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:15,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294671639] [2021-07-09 18:49:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:49:15,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:15,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294671639] [2021-07-09 18:49:15,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294671639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:15,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266423588] [2021-07-09 18:49:15,815 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:15,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:49:15,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:15,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:15,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266423588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:15,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:15,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:49:15,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331885355] [2021-07-09 18:49:15,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:49:15,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:15,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:49:15,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:49:15,944 INFO L87 Difference]: Start difference. First operand 46590 states and 182432 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:16,456 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:49:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:17,243 INFO L93 Difference]: Finished difference Result 67507 states and 253969 transitions. [2021-07-09 18:49:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:49:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:17,756 INFO L225 Difference]: With dead ends: 67507 [2021-07-09 18:49:17,756 INFO L226 Difference]: Without dead ends: 67499 [2021-07-09 18:49:17,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:49:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67499 states. [2021-07-09 18:49:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67499 to 46522. [2021-07-09 18:49:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46522 states, 46521 states have (on average 3.916940736441607) internal successors, (182220), 46521 states have internal predecessors, (182220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46522 states to 46522 states and 182220 transitions. [2021-07-09 18:49:19,422 INFO L78 Accepts]: Start accepts. Automaton has 46522 states and 182220 transitions. Word has length 28 [2021-07-09 18:49:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:19,422 INFO L482 AbstractCegarLoop]: Abstraction has 46522 states and 182220 transitions. [2021-07-09 18:49:19,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 46522 states and 182220 transitions. [2021-07-09 18:49:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:19,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:19,739 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:19,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:19,953 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-07-09 18:49:19,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:19,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302953864] [2021-07-09 18:49:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:49:19,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:19,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302953864] [2021-07-09 18:49:19,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302953864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:19,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880967929] [2021-07-09 18:49:19,986 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:20,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:49:20,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:20,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:20,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:20,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880967929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:20,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:20,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:49:20,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286677561] [2021-07-09 18:49:20,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:49:20,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:20,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:49:20,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:49:20,086 INFO L87 Difference]: Start difference. First operand 46522 states and 182220 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:21,421 INFO L93 Difference]: Finished difference Result 66238 states and 250458 transitions. [2021-07-09 18:49:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:49:21,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:21,658 INFO L225 Difference]: With dead ends: 66238 [2021-07-09 18:49:21,658 INFO L226 Difference]: Without dead ends: 66214 [2021-07-09 18:49:21,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:49:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66214 states. [2021-07-09 18:49:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66214 to 46498. [2021-07-09 18:49:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46498 states, 46497 states have (on average 3.9170699184893647) internal successors, (182132), 46497 states have internal predecessors, (182132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46498 states to 46498 states and 182132 transitions. [2021-07-09 18:49:23,667 INFO L78 Accepts]: Start accepts. Automaton has 46498 states and 182132 transitions. Word has length 28 [2021-07-09 18:49:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:23,667 INFO L482 AbstractCegarLoop]: Abstraction has 46498 states and 182132 transitions. [2021-07-09 18:49:23,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 46498 states and 182132 transitions. [2021-07-09 18:49:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:23,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:23,769 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:23,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-07-09 18:49:23,985 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-07-09 18:49:23,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:23,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275075341] [2021-07-09 18:49:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:24,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:24,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275075341] [2021-07-09 18:49:24,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275075341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:24,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149649941] [2021-07-09 18:49:24,020 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:24,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149649941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:24,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:24,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:49:24,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880184120] [2021-07-09 18:49:24,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:24,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:24,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:24,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:24,176 INFO L87 Difference]: Start difference. First operand 46498 states and 182132 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:26,053 INFO L93 Difference]: Finished difference Result 69780 states and 260558 transitions. [2021-07-09 18:49:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:49:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:26,303 INFO L225 Difference]: With dead ends: 69780 [2021-07-09 18:49:26,304 INFO L226 Difference]: Without dead ends: 69780 [2021-07-09 18:49:26,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 814.9ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:49:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69780 states. [2021-07-09 18:49:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69780 to 51268. [2021-07-09 18:49:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51268 states, 51267 states have (on average 3.8675756334484173) internal successors, (198279), 51267 states have internal predecessors, (198279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51268 states to 51268 states and 198279 transitions. [2021-07-09 18:49:28,294 INFO L78 Accepts]: Start accepts. Automaton has 51268 states and 198279 transitions. Word has length 28 [2021-07-09 18:49:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:28,294 INFO L482 AbstractCegarLoop]: Abstraction has 51268 states and 198279 transitions. [2021-07-09 18:49:28,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 51268 states and 198279 transitions. [2021-07-09 18:49:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:28,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:28,387 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:28,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:28,601 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:28,601 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-07-09 18:49:28,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:28,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279938620] [2021-07-09 18:49:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:28,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:28,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279938620] [2021-07-09 18:49:28,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279938620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:28,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961979461] [2021-07-09 18:49:28,635 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:28,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:28,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:28,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961979461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:28,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:28,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:49:28,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426962189] [2021-07-09 18:49:28,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:28,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:28,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:28,721 INFO L87 Difference]: Start difference. First operand 51268 states and 198279 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:30,329 INFO L93 Difference]: Finished difference Result 68981 states and 258379 transitions. [2021-07-09 18:49:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:49:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:30,574 INFO L225 Difference]: With dead ends: 68981 [2021-07-09 18:49:30,574 INFO L226 Difference]: Without dead ends: 68973 [2021-07-09 18:49:30,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:49:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68973 states. [2021-07-09 18:49:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68973 to 50106. [2021-07-09 18:49:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50106 states, 50105 states have (on average 3.885001496856601) internal successors, (194658), 50105 states have internal predecessors, (194658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50106 states to 50106 states and 194658 transitions. [2021-07-09 18:49:32,628 INFO L78 Accepts]: Start accepts. Automaton has 50106 states and 194658 transitions. Word has length 28 [2021-07-09 18:49:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:32,628 INFO L482 AbstractCegarLoop]: Abstraction has 50106 states and 194658 transitions. [2021-07-09 18:49:32,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50106 states and 194658 transitions. [2021-07-09 18:49:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:32,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:32,716 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:32,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-09 18:49:32,931 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:32,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-07-09 18:49:32,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:32,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133649874] [2021-07-09 18:49:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:32,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:32,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133649874] [2021-07-09 18:49:32,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133649874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:32,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530252213] [2021-07-09 18:49:32,965 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:32,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:49:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:33,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530252213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:33,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:33,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:49:33,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764644806] [2021-07-09 18:49:33,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:33,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:33,054 INFO L87 Difference]: Start difference. First operand 50106 states and 194658 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:34,665 INFO L93 Difference]: Finished difference Result 67179 states and 253388 transitions. [2021-07-09 18:49:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:49:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:34,903 INFO L225 Difference]: With dead ends: 67179 [2021-07-09 18:49:34,903 INFO L226 Difference]: Without dead ends: 67155 [2021-07-09 18:49:34,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:49:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67155 states. [2021-07-09 18:49:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67155 to 50086. [2021-07-09 18:49:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.883278426674653) internal successors, (194494), 50085 states have internal predecessors, (194494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194494 transitions. [2021-07-09 18:49:36,932 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194494 transitions. Word has length 28 [2021-07-09 18:49:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:36,933 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194494 transitions. [2021-07-09 18:49:36,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194494 transitions. [2021-07-09 18:49:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:37,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:37,020 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:37,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-09 18:49:37,235 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:37,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:37,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-07-09 18:49:37,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:37,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333546988] [2021-07-09 18:49:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:37,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:37,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333546988] [2021-07-09 18:49:37,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333546988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:37,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320067271] [2021-07-09 18:49:37,270 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:37,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:49:37,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:37,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:37,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:37,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320067271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:37,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:37,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:49:37,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780394140] [2021-07-09 18:49:37,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:49:37,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:37,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:49:37,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:49:37,355 INFO L87 Difference]: Start difference. First operand 50086 states and 194494 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:38,094 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-09 18:49:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:38,752 INFO L93 Difference]: Finished difference Result 68547 states and 257187 transitions. [2021-07-09 18:49:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:49:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:39,166 INFO L225 Difference]: With dead ends: 68547 [2021-07-09 18:49:39,167 INFO L226 Difference]: Without dead ends: 68507 [2021-07-09 18:49:39,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 747.3ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:49:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68507 states. [2021-07-09 18:49:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68507 to 50240. [2021-07-09 18:49:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50240 states, 50239 states have (on average 3.882621071279285) internal successors, (195059), 50239 states have internal predecessors, (195059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50240 states to 50240 states and 195059 transitions. [2021-07-09 18:49:41,348 INFO L78 Accepts]: Start accepts. Automaton has 50240 states and 195059 transitions. Word has length 28 [2021-07-09 18:49:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:41,349 INFO L482 AbstractCegarLoop]: Abstraction has 50240 states and 195059 transitions. [2021-07-09 18:49:41,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50240 states and 195059 transitions. [2021-07-09 18:49:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:41,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:41,480 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:41,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-09 18:49:41,685 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-07-09 18:49:41,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:41,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160304351] [2021-07-09 18:49:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:41,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:41,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160304351] [2021-07-09 18:49:41,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160304351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877195339] [2021-07-09 18:49:41,740 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:41,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:49:41,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:41,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:41,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:41,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877195339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:41,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:41,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:49:41,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931108055] [2021-07-09 18:49:41,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:49:41,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:49:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:49:41,862 INFO L87 Difference]: Start difference. First operand 50240 states and 195059 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:43,718 INFO L93 Difference]: Finished difference Result 67665 states and 254567 transitions. [2021-07-09 18:49:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:49:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:43,977 INFO L225 Difference]: With dead ends: 67665 [2021-07-09 18:49:43,977 INFO L226 Difference]: Without dead ends: 67665 [2021-07-09 18:49:43,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:49:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-07-09 18:49:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 51145. [2021-07-09 18:49:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51145 states, 51144 states have (on average 3.8739637103081495) internal successors, (198130), 51144 states have internal predecessors, (198130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51145 states to 51145 states and 198130 transitions. [2021-07-09 18:49:45,917 INFO L78 Accepts]: Start accepts. Automaton has 51145 states and 198130 transitions. Word has length 28 [2021-07-09 18:49:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:45,917 INFO L482 AbstractCegarLoop]: Abstraction has 51145 states and 198130 transitions. [2021-07-09 18:49:45,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 51145 states and 198130 transitions. [2021-07-09 18:49:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:46,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:46,023 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:46,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-07-09 18:49:46,239 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:46,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-07-09 18:49:46,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:46,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111956262] [2021-07-09 18:49:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:46,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:46,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111956262] [2021-07-09 18:49:46,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111956262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:46,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824396150] [2021-07-09 18:49:46,512 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:46,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:49:46,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:46,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824396150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:46,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:46,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:49:46,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199342946] [2021-07-09 18:49:46,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:49:46,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:49:46,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:49:46,665 INFO L87 Difference]: Start difference. First operand 51145 states and 198130 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:48,254 INFO L93 Difference]: Finished difference Result 67040 states and 252804 transitions. [2021-07-09 18:49:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:49:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:48,501 INFO L225 Difference]: With dead ends: 67040 [2021-07-09 18:49:48,501 INFO L226 Difference]: Without dead ends: 67032 [2021-07-09 18:49:48,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 697.9ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:49:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67032 states. [2021-07-09 18:49:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67032 to 51069. [2021-07-09 18:49:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51069 states, 51068 states have (on average 3.875107699537871) internal successors, (197894), 51068 states have internal predecessors, (197894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51069 states to 51069 states and 197894 transitions. [2021-07-09 18:49:50,435 INFO L78 Accepts]: Start accepts. Automaton has 51069 states and 197894 transitions. Word has length 28 [2021-07-09 18:49:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:50,435 INFO L482 AbstractCegarLoop]: Abstraction has 51069 states and 197894 transitions. [2021-07-09 18:49:50,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 51069 states and 197894 transitions. [2021-07-09 18:49:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:50,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:50,543 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:50,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-09 18:49:50,760 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-07-09 18:49:50,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:50,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167867783] [2021-07-09 18:49:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:50,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:50,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167867783] [2021-07-09 18:49:50,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167867783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:50,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916283388] [2021-07-09 18:49:50,794 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916283388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:50,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:50,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:49:50,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671905407] [2021-07-09 18:49:50,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:49:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:49:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:49:50,895 INFO L87 Difference]: Start difference. First operand 51069 states and 197894 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:52,580 INFO L93 Difference]: Finished difference Result 66517 states and 251558 transitions. [2021-07-09 18:49:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:49:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:49:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:52,879 INFO L225 Difference]: With dead ends: 66517 [2021-07-09 18:49:52,879 INFO L226 Difference]: Without dead ends: 66493 [2021-07-09 18:49:52,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 844.2ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:49:52,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66493 states. [2021-07-09 18:49:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66493 to 51055. [2021-07-09 18:49:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51055 states, 51054 states have (on average 3.8750930387432914) internal successors, (197839), 51054 states have internal predecessors, (197839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51055 states to 51055 states and 197839 transitions. [2021-07-09 18:49:55,024 INFO L78 Accepts]: Start accepts. Automaton has 51055 states and 197839 transitions. Word has length 28 [2021-07-09 18:49:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:55,024 INFO L482 AbstractCegarLoop]: Abstraction has 51055 states and 197839 transitions. [2021-07-09 18:49:55,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 51055 states and 197839 transitions. [2021-07-09 18:49:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:55,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:55,113 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:55,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:55,329 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:55,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-07-09 18:49:55,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:55,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626416032] [2021-07-09 18:49:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:55,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:55,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626416032] [2021-07-09 18:49:55,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626416032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424121718] [2021-07-09 18:49:55,365 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:55,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:55,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:55,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:55,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424121718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:55,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:55,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:49:55,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972510357] [2021-07-09 18:49:55,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:49:55,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:49:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:49:55,458 INFO L87 Difference]: Start difference. First operand 51055 states and 197839 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-09 18:49:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:56,802 INFO L93 Difference]: Finished difference Result 66299 states and 250865 transitions. [2021-07-09 18:49:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:49:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-07-09 18:49:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:57,307 INFO L225 Difference]: With dead ends: 66299 [2021-07-09 18:49:57,307 INFO L226 Difference]: Without dead ends: 66259 [2021-07-09 18:49:57,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:49:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66259 states. [2021-07-09 18:49:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66259 to 51404. [2021-07-09 18:49:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51404 states, 51403 states have (on average 3.87658307880863) internal successors, (199268), 51403 states have internal predecessors, (199268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51404 states to 51404 states and 199268 transitions. [2021-07-09 18:49:59,333 INFO L78 Accepts]: Start accepts. Automaton has 51404 states and 199268 transitions. Word has length 28 [2021-07-09 18:49:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:59,333 INFO L482 AbstractCegarLoop]: Abstraction has 51404 states and 199268 transitions. [2021-07-09 18:49:59,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-07-09 18:49:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 51404 states and 199268 transitions. [2021-07-09 18:49:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:49:59,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:59,471 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:59,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:59,687 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:59,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:59,687 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-07-09 18:49:59,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:59,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065197424] [2021-07-09 18:49:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:59,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065197424] [2021-07-09 18:49:59,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065197424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149353687] [2021-07-09 18:49:59,721 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:59,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:49:59,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:49:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:59,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149353687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:59,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:59,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:49:59,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621085497] [2021-07-09 18:49:59,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:49:59,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:49:59,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:49:59,836 INFO L87 Difference]: Start difference. First operand 51404 states and 199268 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:01,392 INFO L93 Difference]: Finished difference Result 80562 states and 301306 transitions. [2021-07-09 18:50:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:50:01,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:01,697 INFO L225 Difference]: With dead ends: 80562 [2021-07-09 18:50:01,697 INFO L226 Difference]: Without dead ends: 80562 [2021-07-09 18:50:01,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:50:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80562 states. [2021-07-09 18:50:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80562 to 52570. [2021-07-09 18:50:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52570 states, 52569 states have (on average 3.888660617474177) internal successors, (204423), 52569 states have internal predecessors, (204423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52570 states to 52570 states and 204423 transitions. [2021-07-09 18:50:04,368 INFO L78 Accepts]: Start accepts. Automaton has 52570 states and 204423 transitions. Word has length 28 [2021-07-09 18:50:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:04,368 INFO L482 AbstractCegarLoop]: Abstraction has 52570 states and 204423 transitions. [2021-07-09 18:50:04,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 52570 states and 204423 transitions. [2021-07-09 18:50:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:04,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:04,478 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:50:04,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:04,694 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:04,695 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 154 times [2021-07-09 18:50:04,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:04,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332434701] [2021-07-09 18:50:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:04,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:04,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332434701] [2021-07-09 18:50:04,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332434701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:04,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147965714] [2021-07-09 18:50:04,728 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:04,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:50:04,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147965714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:04,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:04,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:50:04,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651265457] [2021-07-09 18:50:04,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:50:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:50:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:50:04,877 INFO L87 Difference]: Start difference. First operand 52570 states and 204423 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:06,341 INFO L93 Difference]: Finished difference Result 73577 states and 279250 transitions. [2021-07-09 18:50:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:50:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:06,621 INFO L225 Difference]: With dead ends: 73577 [2021-07-09 18:50:06,621 INFO L226 Difference]: Without dead ends: 73577 [2021-07-09 18:50:06,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:50:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73577 states. [2021-07-09 18:50:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73577 to 52600. [2021-07-09 18:50:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52600 states, 52599 states have (on average 3.888476967242723) internal successors, (204530), 52599 states have internal predecessors, (204530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52600 states to 52600 states and 204530 transitions. [2021-07-09 18:50:08,930 INFO L78 Accepts]: Start accepts. Automaton has 52600 states and 204530 transitions. Word has length 28 [2021-07-09 18:50:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:08,930 INFO L482 AbstractCegarLoop]: Abstraction has 52600 states and 204530 transitions. [2021-07-09 18:50:08,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 52600 states and 204530 transitions. [2021-07-09 18:50:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:09,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:09,356 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:50:09,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:09,572 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:09,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 155 times [2021-07-09 18:50:09,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:09,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639603965] [2021-07-09 18:50:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:09,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:09,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639603965] [2021-07-09 18:50:09,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639603965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:09,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114677540] [2021-07-09 18:50:09,606 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:09,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:50:09,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:09,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:09,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114677540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:09,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:09,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:50:09,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735138240] [2021-07-09 18:50:09,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:50:09,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:50:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:50:09,731 INFO L87 Difference]: Start difference. First operand 52600 states and 204530 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:10,995 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-09 18:50:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:11,745 INFO L93 Difference]: Finished difference Result 74613 states and 282201 transitions. [2021-07-09 18:50:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:50:11,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:12,217 INFO L225 Difference]: With dead ends: 74613 [2021-07-09 18:50:12,218 INFO L226 Difference]: Without dead ends: 74613 [2021-07-09 18:50:12,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1162.7ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:50:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74613 states. [2021-07-09 18:50:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74613 to 52864. [2021-07-09 18:50:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52864 states, 52863 states have (on average 3.8852883869625257) internal successors, (205388), 52863 states have internal predecessors, (205388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52864 states to 52864 states and 205388 transitions. [2021-07-09 18:50:14,400 INFO L78 Accepts]: Start accepts. Automaton has 52864 states and 205388 transitions. Word has length 28 [2021-07-09 18:50:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:14,400 INFO L482 AbstractCegarLoop]: Abstraction has 52864 states and 205388 transitions. [2021-07-09 18:50:14,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 52864 states and 205388 transitions. [2021-07-09 18:50:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:14,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:14,497 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:50:14,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:14,699 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:14,700 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 156 times [2021-07-09 18:50:14,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:14,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589416864] [2021-07-09 18:50:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:14,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:14,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589416864] [2021-07-09 18:50:14,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589416864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056456173] [2021-07-09 18:50:14,733 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:14,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:50:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:14,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056456173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:14,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:14,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:50:14,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753543858] [2021-07-09 18:50:14,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:50:14,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:14,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:50:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:50:14,841 INFO L87 Difference]: Start difference. First operand 52864 states and 205388 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:16,629 INFO L93 Difference]: Finished difference Result 73622 states and 279382 transitions. [2021-07-09 18:50:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:50:16,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:16,917 INFO L225 Difference]: With dead ends: 73622 [2021-07-09 18:50:16,918 INFO L226 Difference]: Without dead ends: 73618 [2021-07-09 18:50:16,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 654.4ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:50:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73618 states. [2021-07-09 18:50:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73618 to 52500. [2021-07-09 18:50:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52500 states, 52499 states have (on average 3.8886835939732185) internal successors, (204152), 52499 states have internal predecessors, (204152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52500 states to 52500 states and 204152 transitions. [2021-07-09 18:50:19,036 INFO L78 Accepts]: Start accepts. Automaton has 52500 states and 204152 transitions. Word has length 28 [2021-07-09 18:50:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:19,036 INFO L482 AbstractCegarLoop]: Abstraction has 52500 states and 204152 transitions. [2021-07-09 18:50:19,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 52500 states and 204152 transitions. [2021-07-09 18:50:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:19,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:19,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:50:19,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-07-09 18:50:19,349 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 157 times [2021-07-09 18:50:19,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:19,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093892016] [2021-07-09 18:50:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:19,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:19,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093892016] [2021-07-09 18:50:19,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093892016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:19,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418921892] [2021-07-09 18:50:19,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:19,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:19,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418921892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:19,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:19,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:50:19,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374913389] [2021-07-09 18:50:19,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:50:19,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:19,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:50:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:50:19,490 INFO L87 Difference]: Start difference. First operand 52500 states and 204152 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:19,970 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-07-09 18:50:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:21,009 INFO L93 Difference]: Finished difference Result 67618 states and 258391 transitions. [2021-07-09 18:50:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:50:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:21,280 INFO L225 Difference]: With dead ends: 67618 [2021-07-09 18:50:21,280 INFO L226 Difference]: Without dead ends: 67618 [2021-07-09 18:50:21,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:50:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67618 states. [2021-07-09 18:50:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67618 to 52516. [2021-07-09 18:50:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52516 states, 52515 states have (on average 3.8903170522707797) internal successors, (204300), 52515 states have internal predecessors, (204300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52516 states to 52516 states and 204300 transitions. [2021-07-09 18:50:23,353 INFO L78 Accepts]: Start accepts. Automaton has 52516 states and 204300 transitions. Word has length 28 [2021-07-09 18:50:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:23,353 INFO L482 AbstractCegarLoop]: Abstraction has 52516 states and 204300 transitions. [2021-07-09 18:50:23,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 52516 states and 204300 transitions. [2021-07-09 18:50:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:23,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:23,456 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:50:23,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-09 18:50:23,672 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:23,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 158 times [2021-07-09 18:50:23,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:23,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653083812] [2021-07-09 18:50:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:23,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:23,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653083812] [2021-07-09 18:50:23,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653083812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:23,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974380696] [2021-07-09 18:50:23,706 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:23,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:50:23,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:23,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:23,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974380696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:23,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:23,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:50:23,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847518845] [2021-07-09 18:50:23,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:50:23,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:23,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:50:23,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:50:23,817 INFO L87 Difference]: Start difference. First operand 52516 states and 204300 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:24,917 INFO L93 Difference]: Finished difference Result 66808 states and 256162 transitions. [2021-07-09 18:50:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:50:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:25,175 INFO L225 Difference]: With dead ends: 66808 [2021-07-09 18:50:25,175 INFO L226 Difference]: Without dead ends: 66796 [2021-07-09 18:50:25,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:50:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66796 states. [2021-07-09 18:50:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66796 to 52450. [2021-07-09 18:50:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52450 states, 52449 states have (on average 3.8913420656256554) internal successors, (204097), 52449 states have internal predecessors, (204097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 204097 transitions. [2021-07-09 18:50:27,077 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 204097 transitions. Word has length 28 [2021-07-09 18:50:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:27,077 INFO L482 AbstractCegarLoop]: Abstraction has 52450 states and 204097 transitions. [2021-07-09 18:50:27,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 204097 transitions. [2021-07-09 18:50:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:27,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:27,178 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:50:27,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-09 18:50:27,393 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 159 times [2021-07-09 18:50:27,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:27,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616533157] [2021-07-09 18:50:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:27,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:27,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616533157] [2021-07-09 18:50:27,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616533157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:27,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156259551] [2021-07-09 18:50:27,429 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:27,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:50:27,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:27,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156259551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:27,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:27,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:50:27,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830460443] [2021-07-09 18:50:27,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:50:27,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:50:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:50:27,542 INFO L87 Difference]: Start difference. First operand 52450 states and 204097 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:27,898 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 18:50:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:28,545 INFO L93 Difference]: Finished difference Result 57072 states and 219303 transitions. [2021-07-09 18:50:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:28,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:29,113 INFO L225 Difference]: With dead ends: 57072 [2021-07-09 18:50:29,114 INFO L226 Difference]: Without dead ends: 57072 [2021-07-09 18:50:29,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57072 states. [2021-07-09 18:50:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57072 to 52658. [2021-07-09 18:50:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52658 states, 52657 states have (on average 3.8891125586341797) internal successors, (204789), 52657 states have internal predecessors, (204789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52658 states to 52658 states and 204789 transitions. [2021-07-09 18:50:30,735 INFO L78 Accepts]: Start accepts. Automaton has 52658 states and 204789 transitions. Word has length 28 [2021-07-09 18:50:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:30,736 INFO L482 AbstractCegarLoop]: Abstraction has 52658 states and 204789 transitions. [2021-07-09 18:50:30,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52658 states and 204789 transitions. [2021-07-09 18:50:30,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:30,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:30,836 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:50:31,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:31,052 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:31,052 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 160 times [2021-07-09 18:50:31,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:31,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761307010] [2021-07-09 18:50:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:31,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:31,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761307010] [2021-07-09 18:50:31,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761307010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:31,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040868163] [2021-07-09 18:50:31,085 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:31,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:50:31,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:31,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040868163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:31,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:31,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:50:31,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37443474] [2021-07-09 18:50:31,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:50:31,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:50:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:50:31,186 INFO L87 Difference]: Start difference. First operand 52658 states and 204789 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:32,029 INFO L93 Difference]: Finished difference Result 56883 states and 218795 transitions. [2021-07-09 18:50:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:50:32,029 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:32,427 INFO L225 Difference]: With dead ends: 56883 [2021-07-09 18:50:32,428 INFO L226 Difference]: Without dead ends: 56879 [2021-07-09 18:50:32,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:50:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56879 states. [2021-07-09 18:50:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56879 to 52598. [2021-07-09 18:50:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52598 states, 52597 states have (on average 3.889898663421868) internal successors, (204597), 52597 states have internal predecessors, (204597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52598 states to 52598 states and 204597 transitions. [2021-07-09 18:50:34,087 INFO L78 Accepts]: Start accepts. Automaton has 52598 states and 204597 transitions. Word has length 28 [2021-07-09 18:50:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:34,087 INFO L482 AbstractCegarLoop]: Abstraction has 52598 states and 204597 transitions. [2021-07-09 18:50:34,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 52598 states and 204597 transitions. [2021-07-09 18:50:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:34,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:34,198 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] [2021-07-09 18:50:34,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-09 18:50:34,405 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 87 times [2021-07-09 18:50:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:34,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360313090] [2021-07-09 18:50:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:34,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:34,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360313090] [2021-07-09 18:50:34,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360313090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:34,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287746302] [2021-07-09 18:50:34,439 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:34,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:50:34,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:34,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287746302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:34,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:34,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 18:50:34,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940407973] [2021-07-09 18:50:34,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:50:34,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:50:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:50:34,509 INFO L87 Difference]: Start difference. First operand 52598 states and 204597 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:35,414 INFO L93 Difference]: Finished difference Result 56952 states and 218997 transitions. [2021-07-09 18:50:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:50:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:35,621 INFO L225 Difference]: With dead ends: 56952 [2021-07-09 18:50:35,621 INFO L226 Difference]: Without dead ends: 56952 [2021-07-09 18:50:35,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:50:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56952 states. [2021-07-09 18:50:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56952 to 52718. [2021-07-09 18:50:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52718 states, 52717 states have (on average 3.8880247358537092) internal successors, (204965), 52717 states have internal predecessors, (204965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52718 states to 52718 states and 204965 transitions. [2021-07-09 18:50:37,448 INFO L78 Accepts]: Start accepts. Automaton has 52718 states and 204965 transitions. Word has length 28 [2021-07-09 18:50:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:37,448 INFO L482 AbstractCegarLoop]: Abstraction has 52718 states and 204965 transitions. [2021-07-09 18:50:37,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 52718 states and 204965 transitions. [2021-07-09 18:50:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:37,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:37,554 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] [2021-07-09 18:50:37,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:37,770 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:37,770 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 88 times [2021-07-09 18:50:37,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:37,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85597092] [2021-07-09 18:50:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:50:37,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85597092] [2021-07-09 18:50:37,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85597092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929568050] [2021-07-09 18:50:37,799 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:37,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:50:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:50:37,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929568050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:37,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:37,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:50:37,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353652978] [2021-07-09 18:50:37,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:50:37,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:37,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:50:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:50:37,871 INFO L87 Difference]: Start difference. First operand 52718 states and 204965 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:38,212 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-09 18:50:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:38,624 INFO L93 Difference]: Finished difference Result 57132 states and 219636 transitions. [2021-07-09 18:50:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:50:38,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:38,840 INFO L225 Difference]: With dead ends: 57132 [2021-07-09 18:50:38,841 INFO L226 Difference]: Without dead ends: 57120 [2021-07-09 18:50:38,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:50:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57120 states. [2021-07-09 18:50:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57120 to 52852. [2021-07-09 18:50:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.8863976083707024) internal successors, (205400), 52851 states have internal predecessors, (205400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205400 transitions. [2021-07-09 18:50:40,768 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205400 transitions. Word has length 28 [2021-07-09 18:50:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:40,768 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205400 transitions. [2021-07-09 18:50:40,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205400 transitions. [2021-07-09 18:50:40,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:40,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:40,871 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] [2021-07-09 18:50:41,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-09 18:50:41,073 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 89 times [2021-07-09 18:50:41,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:41,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872318829] [2021-07-09 18:50:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:41,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872318829] [2021-07-09 18:50:41,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872318829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874903437] [2021-07-09 18:50:41,108 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:41,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:50:41,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:50:41,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:41,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874903437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:41,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:41,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 18:50:41,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147389613] [2021-07-09 18:50:41,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:50:41,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:41,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:50:41,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:50:41,180 INFO L87 Difference]: Start difference. First operand 52852 states and 205400 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:41,972 INFO L93 Difference]: Finished difference Result 57096 states and 219552 transitions. [2021-07-09 18:50:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:50:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:42,192 INFO L225 Difference]: With dead ends: 57096 [2021-07-09 18:50:42,192 INFO L226 Difference]: Without dead ends: 57076 [2021-07-09 18:50:42,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:50:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57076 states. [2021-07-09 18:50:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57076 to 52852. [2021-07-09 18:50:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.886321923899264) internal successors, (205396), 52851 states have internal predecessors, (205396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205396 transitions. [2021-07-09 18:50:44,055 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205396 transitions. Word has length 28 [2021-07-09 18:50:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:44,055 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205396 transitions. [2021-07-09 18:50:44,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205396 transitions. [2021-07-09 18:50:44,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:44,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:44,158 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] [2021-07-09 18:50:44,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-09 18:50:44,369 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:44,369 INFO L82 PathProgramCache]: Analyzing trace with hash 970045237, now seen corresponding path program 161 times [2021-07-09 18:50:44,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:44,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710966578] [2021-07-09 18:50:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:44,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:44,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710966578] [2021-07-09 18:50:44,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710966578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:44,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308004223] [2021-07-09 18:50:44,400 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:44,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:50:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:50:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:44,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308004223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:44,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:44,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:50:44,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12153380] [2021-07-09 18:50:44,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:50:44,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:44,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:50:44,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:50:44,477 INFO L87 Difference]: Start difference. First operand 52852 states and 205396 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:45,261 INFO L93 Difference]: Finished difference Result 57813 states and 222961 transitions. [2021-07-09 18:50:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:50:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:45,515 INFO L225 Difference]: With dead ends: 57813 [2021-07-09 18:50:45,515 INFO L226 Difference]: Without dead ends: 57800 [2021-07-09 18:50:45,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:50:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57800 states. [2021-07-09 18:50:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57800 to 55585. [2021-07-09 18:50:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 3.8929188255613125) internal successors, (216384), 55584 states have internal predecessors, (216384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 216384 transitions. [2021-07-09 18:50:47,556 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 216384 transitions. Word has length 28 [2021-07-09 18:50:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:47,556 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 216384 transitions. [2021-07-09 18:50:47,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 216384 transitions. [2021-07-09 18:50:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:47,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:47,669 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] [2021-07-09 18:50:47,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-07-09 18:50:47,885 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 162 times [2021-07-09 18:50:47,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:47,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846663999] [2021-07-09 18:50:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:47,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846663999] [2021-07-09 18:50:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846663999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654775629] [2021-07-09 18:50:47,918 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:47,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:50:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:47,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:50:47,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:48,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654775629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:48,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:48,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:50:48,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287206812] [2021-07-09 18:50:48,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:50:48,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:50:48,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:50:48,009 INFO L87 Difference]: Start difference. First operand 55585 states and 216384 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:48,870 INFO L93 Difference]: Finished difference Result 61541 states and 235789 transitions. [2021-07-09 18:50:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:50:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:49,132 INFO L225 Difference]: With dead ends: 61541 [2021-07-09 18:50:49,132 INFO L226 Difference]: Without dead ends: 61541 [2021-07-09 18:50:49,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:50:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61541 states. [2021-07-09 18:50:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61541 to 49164. [2021-07-09 18:50:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49164 states, 49163 states have (on average 3.882350548176474) internal successors, (190868), 49163 states have internal predecessors, (190868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49164 states to 49164 states and 190868 transitions. [2021-07-09 18:50:51,029 INFO L78 Accepts]: Start accepts. Automaton has 49164 states and 190868 transitions. Word has length 28 [2021-07-09 18:50:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:51,029 INFO L482 AbstractCegarLoop]: Abstraction has 49164 states and 190868 transitions. [2021-07-09 18:50:51,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49164 states and 190868 transitions. [2021-07-09 18:50:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:51,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:51,129 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] [2021-07-09 18:50:51,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-07-09 18:50:51,345 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash -32817557, now seen corresponding path program 163 times [2021-07-09 18:50:51,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:51,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808323472] [2021-07-09 18:50:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:51,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:51,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808323472] [2021-07-09 18:50:51,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808323472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:51,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903694812] [2021-07-09 18:50:51,378 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:50:51,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:51,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903694812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:51,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:51,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:50:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909429453] [2021-07-09 18:50:51,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:50:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:50:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:50:51,460 INFO L87 Difference]: Start difference. First operand 49164 states and 190868 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:52,127 INFO L93 Difference]: Finished difference Result 54122 states and 207592 transitions. [2021-07-09 18:50:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:50:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:52,524 INFO L225 Difference]: With dead ends: 54122 [2021-07-09 18:50:52,524 INFO L226 Difference]: Without dead ends: 54122 [2021-07-09 18:50:52,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:50:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54122 states. [2021-07-09 18:50:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54122 to 49997. [2021-07-09 18:50:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49997 states, 49996 states have (on average 3.880830466437315) internal successors, (194026), 49996 states have internal predecessors, (194026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49997 states to 49997 states and 194026 transitions. [2021-07-09 18:50:53,998 INFO L78 Accepts]: Start accepts. Automaton has 49997 states and 194026 transitions. Word has length 28 [2021-07-09 18:50:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:53,998 INFO L482 AbstractCegarLoop]: Abstraction has 49997 states and 194026 transitions. [2021-07-09 18:50:53,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49997 states and 194026 transitions. [2021-07-09 18:50:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:54,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:54,101 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] [2021-07-09 18:50:54,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:54,304 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 164 times [2021-07-09 18:50:54,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:54,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231915834] [2021-07-09 18:50:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:54,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231915834] [2021-07-09 18:50:54,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231915834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785300451] [2021-07-09 18:50:54,351 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:54,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:50:54,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:50:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:54,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785300451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:54,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:54,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:50:54,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653263860] [2021-07-09 18:50:54,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:50:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:50:54,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:50:54,440 INFO L87 Difference]: Start difference. First operand 49997 states and 194026 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:55,274 INFO L93 Difference]: Finished difference Result 51830 states and 200167 transitions. [2021-07-09 18:50:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:50:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:55,491 INFO L225 Difference]: With dead ends: 51830 [2021-07-09 18:50:55,491 INFO L226 Difference]: Without dead ends: 51830 [2021-07-09 18:50:55,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:50:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51830 states. [2021-07-09 18:50:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51830 to 50005. [2021-07-09 18:50:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50005 states, 50004 states have (on average 3.880689544836413) internal successors, (194050), 50004 states have internal predecessors, (194050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50005 states to 50005 states and 194050 transitions. [2021-07-09 18:50:57,161 INFO L78 Accepts]: Start accepts. Automaton has 50005 states and 194050 transitions. Word has length 28 [2021-07-09 18:50:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:57,161 INFO L482 AbstractCegarLoop]: Abstraction has 50005 states and 194050 transitions. [2021-07-09 18:50:57,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 50005 states and 194050 transitions. [2021-07-09 18:50:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:50:57,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:57,516 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] [2021-07-09 18:50:57,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:57,729 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 165 times [2021-07-09 18:50:57,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:57,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530570059] [2021-07-09 18:50:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:57,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530570059] [2021-07-09 18:50:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530570059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015446477] [2021-07-09 18:50:57,768 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:57,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:50:57,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:50:57,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:57,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015446477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:57,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:57,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:50:57,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159360837] [2021-07-09 18:50:57,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:50:57,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:57,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:50:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:50:57,853 INFO L87 Difference]: Start difference. First operand 50005 states and 194050 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:58,363 INFO L93 Difference]: Finished difference Result 51550 states and 199245 transitions. [2021-07-09 18:50:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:50:58,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:50:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:58,823 INFO L225 Difference]: With dead ends: 51550 [2021-07-09 18:50:58,823 INFO L226 Difference]: Without dead ends: 51550 [2021-07-09 18:50:58,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:50:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51550 states. [2021-07-09 18:51:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51550 to 49899. [2021-07-09 18:51:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49899 states, 49898 states have (on average 3.8804360896228305) internal successors, (193626), 49898 states have internal predecessors, (193626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49899 states to 49899 states and 193626 transitions. [2021-07-09 18:51:00,290 INFO L78 Accepts]: Start accepts. Automaton has 49899 states and 193626 transitions. Word has length 28 [2021-07-09 18:51:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:00,290 INFO L482 AbstractCegarLoop]: Abstraction has 49899 states and 193626 transitions. [2021-07-09 18:51:00,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 49899 states and 193626 transitions. [2021-07-09 18:51:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:00,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:00,389 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] [2021-07-09 18:51:00,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:00,598 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 166 times [2021-07-09 18:51:00,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:00,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720505744] [2021-07-09 18:51:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:00,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:00,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720505744] [2021-07-09 18:51:00,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720505744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:00,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795149869] [2021-07-09 18:51:00,827 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:00,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:51:00,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:51:00,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:01,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:01,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:01,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 13 [2021-07-09 18:51:01,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:01,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:01,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:01,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-09 18:51:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:01,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795149869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:01,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:01,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:51:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065670416] [2021-07-09 18:51:01,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:51:01,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:51:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:51:01,363 INFO L87 Difference]: Start difference. First operand 49899 states and 193626 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:02,776 INFO L93 Difference]: Finished difference Result 53034 states and 202923 transitions. [2021-07-09 18:51:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:51:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 30 [2021-07-09 18:51:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:02,971 INFO L225 Difference]: With dead ends: 53034 [2021-07-09 18:51:02,972 INFO L226 Difference]: Without dead ends: 53004 [2021-07-09 18:51:02,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 840.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:51:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53004 states. [2021-07-09 18:51:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53004 to 49956. [2021-07-09 18:51:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49956 states, 49955 states have (on average 3.8796717045340805) internal successors, (193809), 49955 states have internal predecessors, (193809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49956 states to 49956 states and 193809 transitions. [2021-07-09 18:51:04,434 INFO L78 Accepts]: Start accepts. Automaton has 49956 states and 193809 transitions. Word has length 30 [2021-07-09 18:51:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:04,434 INFO L482 AbstractCegarLoop]: Abstraction has 49956 states and 193809 transitions. [2021-07-09 18:51:04,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 49956 states and 193809 transitions. [2021-07-09 18:51:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:04,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:04,524 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] [2021-07-09 18:51:04,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:04,737 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 167 times [2021-07-09 18:51:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:04,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657867349] [2021-07-09 18:51:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:05,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:05,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657867349] [2021-07-09 18:51:05,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657867349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:05,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28342054] [2021-07-09 18:51:05,247 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:05,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:51:05,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:51:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:05,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:05,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:05,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:05,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 13 [2021-07-09 18:51:05,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:05,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:05,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:05,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-07-09 18:51:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:05,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28342054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:05,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:05,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:51:05,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279220381] [2021-07-09 18:51:05,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:51:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:51:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:51:05,593 INFO L87 Difference]: Start difference. First operand 49956 states and 193809 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:07,366 INFO L93 Difference]: Finished difference Result 53044 states and 202956 transitions. [2021-07-09 18:51:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:51:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:07,561 INFO L225 Difference]: With dead ends: 53044 [2021-07-09 18:51:07,561 INFO L226 Difference]: Without dead ends: 53029 [2021-07-09 18:51:07,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1381.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:51:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53029 states. [2021-07-09 18:51:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53029 to 49948. [2021-07-09 18:51:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49948 states, 49947 states have (on average 3.8798726650249264) internal successors, (193788), 49947 states have internal predecessors, (193788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49948 states to 49948 states and 193788 transitions. [2021-07-09 18:51:09,362 INFO L78 Accepts]: Start accepts. Automaton has 49948 states and 193788 transitions. Word has length 30 [2021-07-09 18:51:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:09,362 INFO L482 AbstractCegarLoop]: Abstraction has 49948 states and 193788 transitions. [2021-07-09 18:51:09,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 49948 states and 193788 transitions. [2021-07-09 18:51:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:09,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:09,471 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] [2021-07-09 18:51:09,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:09,688 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 168 times [2021-07-09 18:51:09,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:09,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098160853] [2021-07-09 18:51:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:09,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:09,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098160853] [2021-07-09 18:51:09,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098160853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:09,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847001338] [2021-07-09 18:51:09,878 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:09,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:51:09,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:51:09,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:10,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:10,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:10,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:10,138 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 27 treesize of output 13 [2021-07-09 18:51:10,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:10,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:10,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:10,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-09 18:51:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:10,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847001338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:10,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:10,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:51:10,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934275570] [2021-07-09 18:51:10,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:51:10,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:10,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:51:10,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:51:10,159 INFO L87 Difference]: Start difference. First operand 49948 states and 193788 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:10,938 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-07-09 18:51:11,743 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-09 18:51:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:14,153 INFO L93 Difference]: Finished difference Result 63314 states and 238515 transitions. [2021-07-09 18:51:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:51:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:14,370 INFO L225 Difference]: With dead ends: 63314 [2021-07-09 18:51:14,370 INFO L226 Difference]: Without dead ends: 63299 [2021-07-09 18:51:14,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 3078.2ms TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:51:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63299 states. [2021-07-09 18:51:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63299 to 50006. [2021-07-09 18:51:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50006 states, 50005 states have (on average 3.8794120587941205) internal successors, (193990), 50005 states have internal predecessors, (193990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50006 states to 50006 states and 193990 transitions. [2021-07-09 18:51:15,854 INFO L78 Accepts]: Start accepts. Automaton has 50006 states and 193990 transitions. Word has length 30 [2021-07-09 18:51:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:15,854 INFO L482 AbstractCegarLoop]: Abstraction has 50006 states and 193990 transitions. [2021-07-09 18:51:15,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 50006 states and 193990 transitions. [2021-07-09 18:51:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:15,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:15,950 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] [2021-07-09 18:51:16,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-09 18:51:16,165 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash -625667857, now seen corresponding path program 169 times [2021-07-09 18:51:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235129607] [2021-07-09 18:51:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:16,470 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:51:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:16,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235129607] [2021-07-09 18:51:16,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235129607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98545690] [2021-07-09 18:51:16,653 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:51:16,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:16,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:16,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:51:16,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:16,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:16,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:16,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-09 18:51:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98545690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:16,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:16,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:51:16,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311329396] [2021-07-09 18:51:16,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:51:16,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:51:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:51:16,946 INFO L87 Difference]: Start difference. First operand 50006 states and 193990 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:18,588 INFO L93 Difference]: Finished difference Result 55413 states and 210324 transitions. [2021-07-09 18:51:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:51:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:18,799 INFO L225 Difference]: With dead ends: 55413 [2021-07-09 18:51:18,799 INFO L226 Difference]: Without dead ends: 55398 [2021-07-09 18:51:18,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1291.6ms TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:51:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55398 states. [2021-07-09 18:51:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55398 to 50051. [2021-07-09 18:51:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50051 states, 50050 states have (on average 3.878981018981019) internal successors, (194143), 50050 states have internal predecessors, (194143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50051 states to 50051 states and 194143 transitions. [2021-07-09 18:51:20,418 INFO L78 Accepts]: Start accepts. Automaton has 50051 states and 194143 transitions. Word has length 30 [2021-07-09 18:51:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:20,418 INFO L482 AbstractCegarLoop]: Abstraction has 50051 states and 194143 transitions. [2021-07-09 18:51:20,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 50051 states and 194143 transitions. [2021-07-09 18:51:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:20,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:20,515 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] [2021-07-09 18:51:20,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-07-09 18:51:20,730 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 170 times [2021-07-09 18:51:20,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:20,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921499613] [2021-07-09 18:51:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:21,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:21,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921499613] [2021-07-09 18:51:21,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921499613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:21,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963476911] [2021-07-09 18:51:21,003 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:21,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:51:21,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:51:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:21,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:21,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:51:21,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:51:21,352 INFO L628 ElimStorePlain]: treesize reduction 87, result has 40.0 percent of original size [2021-07-09 18:51:21,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 18:51:21,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:84 [2021-07-09 18:51:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:21,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963476911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:21,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:21,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-09 18:51:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976161071] [2021-07-09 18:51:21,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:51:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:51:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:51:21,439 INFO L87 Difference]: Start difference. First operand 50051 states and 194143 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:24,096 INFO L93 Difference]: Finished difference Result 53236 states and 203549 transitions. [2021-07-09 18:51:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:51:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:24,300 INFO L225 Difference]: With dead ends: 53236 [2021-07-09 18:51:24,300 INFO L226 Difference]: Without dead ends: 53221 [2021-07-09 18:51:24,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1840.6ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:51:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53221 states. [2021-07-09 18:51:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53221 to 50057. [2021-07-09 18:51:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50057 states, 50056 states have (on average 3.8790155026370465) internal successors, (194168), 50056 states have internal predecessors, (194168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50057 states to 50057 states and 194168 transitions. [2021-07-09 18:51:26,034 INFO L78 Accepts]: Start accepts. Automaton has 50057 states and 194168 transitions. Word has length 30 [2021-07-09 18:51:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:26,035 INFO L482 AbstractCegarLoop]: Abstraction has 50057 states and 194168 transitions. [2021-07-09 18:51:26,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 50057 states and 194168 transitions. [2021-07-09 18:51:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:26,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:26,135 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] [2021-07-09 18:51:26,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:26,345 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 171 times [2021-07-09 18:51:26,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:26,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377908385] [2021-07-09 18:51:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:26,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:26,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377908385] [2021-07-09 18:51:26,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377908385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:26,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338166251] [2021-07-09 18:51:26,561 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:26,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:51:26,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:26,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:51:26,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:26,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:26,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:26,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:26,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 59 [2021-07-09 18:51:26,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:51:27,007 INFO L628 ElimStorePlain]: treesize reduction 169, result has 26.5 percent of original size [2021-07-09 18:51:27,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:27,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:87 [2021-07-09 18:51:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:27,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338166251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:27,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:27,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-07-09 18:51:27,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057563801] [2021-07-09 18:51:27,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:51:27,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:51:27,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:51:27,138 INFO L87 Difference]: Start difference. First operand 50057 states and 194168 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:28,449 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-07-09 18:51:29,313 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2021-07-09 18:51:29,544 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-07-09 18:51:29,730 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-07-09 18:51:30,101 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-07-09 18:51:30,325 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-07-09 18:51:30,573 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-07-09 18:51:31,020 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-07-09 18:51:31,553 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-07-09 18:51:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:32,651 INFO L93 Difference]: Finished difference Result 71077 states and 266109 transitions. [2021-07-09 18:51:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:51:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:33,108 INFO L225 Difference]: With dead ends: 71077 [2021-07-09 18:51:33,108 INFO L226 Difference]: Without dead ends: 71047 [2021-07-09 18:51:33,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4170.7ms TimeCoverageRelationStatistics Valid=725, Invalid=5281, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:51:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71047 states. [2021-07-09 18:51:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71047 to 50086. [2021-07-09 18:51:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.8791055206149547) internal successors, (194285), 50085 states have internal predecessors, (194285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194285 transitions. [2021-07-09 18:51:34,804 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194285 transitions. Word has length 30 [2021-07-09 18:51:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:34,804 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194285 transitions. [2021-07-09 18:51:34,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194285 transitions. [2021-07-09 18:51:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:34,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:34,899 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] [2021-07-09 18:51:35,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-07-09 18:51:35,113 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1782374869, now seen corresponding path program 172 times [2021-07-09 18:51:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556648326] [2021-07-09 18:51:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:35,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556648326] [2021-07-09 18:51:35,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556648326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680347614] [2021-07-09 18:51:35,489 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:35,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:51:35,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:35,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:51:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:35,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:35,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:35,819 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 25 treesize of output 13 [2021-07-09 18:51:35,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:35,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:35,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:35,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-09 18:51:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:35,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680347614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:35,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:35,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:51:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652879731] [2021-07-09 18:51:35,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:51:35,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:51:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:51:35,848 INFO L87 Difference]: Start difference. First operand 50086 states and 194285 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:37,059 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-09 18:51:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:40,129 INFO L93 Difference]: Finished difference Result 84102 states and 311805 transitions. [2021-07-09 18:51:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:51:40,129 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:40,631 INFO L225 Difference]: With dead ends: 84102 [2021-07-09 18:51:40,631 INFO L226 Difference]: Without dead ends: 84072 [2021-07-09 18:51:40,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 3107.6ms TimeCoverageRelationStatistics Valid=535, Invalid=4435, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:51:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84072 states. [2021-07-09 18:51:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84072 to 50147. [2021-07-09 18:51:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50147 states, 50146 states have (on average 3.8789534559087464) internal successors, (194514), 50146 states have internal predecessors, (194514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50147 states to 50147 states and 194514 transitions. [2021-07-09 18:51:42,703 INFO L78 Accepts]: Start accepts. Automaton has 50147 states and 194514 transitions. Word has length 30 [2021-07-09 18:51:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:42,703 INFO L482 AbstractCegarLoop]: Abstraction has 50147 states and 194514 transitions. [2021-07-09 18:51:42,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 50147 states and 194514 transitions. [2021-07-09 18:51:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:42,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:42,793 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] [2021-07-09 18:51:42,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:42,997 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash -688283281, now seen corresponding path program 173 times [2021-07-09 18:51:42,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:42,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854950003] [2021-07-09 18:51:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:43,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:43,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854950003] [2021-07-09 18:51:43,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854950003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:43,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732934924] [2021-07-09 18:51:43,148 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:43,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:51:43,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:51:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:43,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:43,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:43,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:43,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:43,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:43,429 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 27 treesize of output 13 [2021-07-09 18:51:43,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:43,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:43,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:43,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-09 18:51:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:43,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732934924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:43,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:43,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:51:43,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033036024] [2021-07-09 18:51:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:51:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:51:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:51:43,455 INFO L87 Difference]: Start difference. First operand 50147 states and 194514 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:47,153 INFO L93 Difference]: Finished difference Result 83268 states and 309473 transitions. [2021-07-09 18:51:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:51:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:47,675 INFO L225 Difference]: With dead ends: 83268 [2021-07-09 18:51:47,675 INFO L226 Difference]: Without dead ends: 83253 [2021-07-09 18:51:47,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1986.6ms TimeCoverageRelationStatistics Valid=413, Invalid=3493, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:51:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83253 states. [2021-07-09 18:51:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83253 to 50159. [2021-07-09 18:51:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50159 states, 50158 states have (on average 3.8786634235814823) internal successors, (194546), 50158 states have internal predecessors, (194546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50159 states to 50159 states and 194546 transitions. [2021-07-09 18:51:49,945 INFO L78 Accepts]: Start accepts. Automaton has 50159 states and 194546 transitions. Word has length 30 [2021-07-09 18:51:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:49,945 INFO L482 AbstractCegarLoop]: Abstraction has 50159 states and 194546 transitions. [2021-07-09 18:51:49,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 50159 states and 194546 transitions. [2021-07-09 18:51:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:50,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:50,040 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] [2021-07-09 18:51:50,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:50,255 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1460513255, now seen corresponding path program 174 times [2021-07-09 18:51:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:50,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974096038] [2021-07-09 18:51:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:50,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:50,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974096038] [2021-07-09 18:51:50,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974096038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:50,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783641045] [2021-07-09 18:51:50,406 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:50,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:51:50,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:50,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:51:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:50,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:50,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:50,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:50,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:50,687 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 27 treesize of output 13 [2021-07-09 18:51:50,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:50,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:50,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:50,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-09 18:51:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:50,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783641045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:50,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:50,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:51:50,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101807384] [2021-07-09 18:51:50,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:51:50,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:50,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:51:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:51:50,713 INFO L87 Difference]: Start difference. First operand 50159 states and 194546 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:54,868 INFO L93 Difference]: Finished difference Result 94075 states and 345871 transitions. [2021-07-09 18:51:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:51:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:51:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:55,233 INFO L225 Difference]: With dead ends: 94075 [2021-07-09 18:51:55,234 INFO L226 Difference]: Without dead ends: 94045 [2021-07-09 18:51:55,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2774.6ms TimeCoverageRelationStatistics Valid=621, Invalid=4781, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:51:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94045 states. [2021-07-09 18:51:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94045 to 50168. [2021-07-09 18:51:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50168 states, 50167 states have (on average 3.8787449917276295) internal successors, (194585), 50167 states have internal predecessors, (194585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50168 states to 50168 states and 194585 transitions. [2021-07-09 18:51:57,419 INFO L78 Accepts]: Start accepts. Automaton has 50168 states and 194585 transitions. Word has length 30 [2021-07-09 18:51:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:57,419 INFO L482 AbstractCegarLoop]: Abstraction has 50168 states and 194585 transitions. [2021-07-09 18:51:57,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 50168 states and 194585 transitions. [2021-07-09 18:51:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:51:57,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:57,522 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:51:57,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-07-09 18:51:57,738 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -450848413, now seen corresponding path program 90 times [2021-07-09 18:51:57,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:57,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149073096] [2021-07-09 18:51:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:58,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149073096] [2021-07-09 18:51:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149073096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945800811] [2021-07-09 18:51:58,386 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:58,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:51:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:51:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:58,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:58,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:58,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:58,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:58,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:58,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:51:58,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:51:58,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:51:58,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:58,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:58,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:58,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-07-09 18:51:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:58,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945800811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:58,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:58,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:51:58,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939809936] [2021-07-09 18:51:58,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:51:58,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:58,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:51:58,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:51:58,626 INFO L87 Difference]: Start difference. First operand 50168 states and 194585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:00,826 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-07-09 18:52:00,953 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-09 18:52:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:03,072 INFO L93 Difference]: Finished difference Result 63519 states and 239225 transitions. [2021-07-09 18:52:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:52:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:03,312 INFO L225 Difference]: With dead ends: 63519 [2021-07-09 18:52:03,312 INFO L226 Difference]: Without dead ends: 63504 [2021-07-09 18:52:03,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3633.3ms TimeCoverageRelationStatistics Valid=569, Invalid=3591, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:52:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63504 states. [2021-07-09 18:52:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63504 to 50203. [2021-07-09 18:52:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50203 states, 50202 states have (on average 3.8777538743476354) internal successors, (194671), 50202 states have internal predecessors, (194671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50203 states to 50203 states and 194671 transitions. [2021-07-09 18:52:04,987 INFO L78 Accepts]: Start accepts. Automaton has 50203 states and 194671 transitions. Word has length 30 [2021-07-09 18:52:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:04,987 INFO L482 AbstractCegarLoop]: Abstraction has 50203 states and 194671 transitions. [2021-07-09 18:52:04,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50203 states and 194671 transitions. [2021-07-09 18:52:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:05,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:05,087 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] [2021-07-09 18:52:05,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-07-09 18:52:05,302 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 878036001, now seen corresponding path program 175 times [2021-07-09 18:52:05,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:05,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910122065] [2021-07-09 18:52:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:05,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:05,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910122065] [2021-07-09 18:52:05,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910122065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:05,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490001238] [2021-07-09 18:52:05,464 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:52:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:06,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:06,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:06,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:06,030 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 25 treesize of output 13 [2021-07-09 18:52:06,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:06,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:06,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:06,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-09 18:52:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:06,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490001238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:06,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:06,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:52:06,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095548258] [2021-07-09 18:52:06,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:52:06,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:06,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:52:06,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:52:06,059 INFO L87 Difference]: Start difference. First operand 50203 states and 194671 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:09,666 INFO L93 Difference]: Finished difference Result 83399 states and 309818 transitions. [2021-07-09 18:52:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:52:09,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:09,957 INFO L225 Difference]: With dead ends: 83399 [2021-07-09 18:52:09,957 INFO L226 Difference]: Without dead ends: 83384 [2021-07-09 18:52:09,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2268.0ms TimeCoverageRelationStatistics Valid=468, Invalid=4088, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:52:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83384 states. [2021-07-09 18:52:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83384 to 50245. [2021-07-09 18:52:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-07-09 18:52:11,946 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-07-09 18:52:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:11,946 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-07-09 18:52:11,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-07-09 18:52:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:12,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:12,043 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] [2021-07-09 18:52:12,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-09 18:52:12,259 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2084417043, now seen corresponding path program 176 times [2021-07-09 18:52:12,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:12,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961667181] [2021-07-09 18:52:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:12,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961667181] [2021-07-09 18:52:12,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961667181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838030527] [2021-07-09 18:52:12,711 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:12,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:52:12,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:52:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:12,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:12,941 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 27 treesize of output 13 [2021-07-09 18:52:12,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:12,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:12,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:12,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-09 18:52:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:12,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838030527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:12,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:12,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:52:12,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563250369] [2021-07-09 18:52:12,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:52:12,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:52:12,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:52:12,962 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:14,233 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-07-09 18:52:14,706 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-07-09 18:52:15,173 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-09 18:52:15,782 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-07-09 18:52:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:16,573 INFO L93 Difference]: Finished difference Result 71516 states and 267553 transitions. [2021-07-09 18:52:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:52:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:16,827 INFO L225 Difference]: With dead ends: 71516 [2021-07-09 18:52:16,827 INFO L226 Difference]: Without dead ends: 71501 [2021-07-09 18:52:16,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2798.0ms TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:52:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2021-07-09 18:52:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 50245. [2021-07-09 18:52:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-07-09 18:52:18,753 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-07-09 18:52:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:18,753 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-07-09 18:52:18,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-07-09 18:52:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:18,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:18,855 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] [2021-07-09 18:52:19,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-07-09 18:52:19,069 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1108098199, now seen corresponding path program 177 times [2021-07-09 18:52:19,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:19,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136983254] [2021-07-09 18:52:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:19,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:19,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136983254] [2021-07-09 18:52:19,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136983254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:19,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633336392] [2021-07-09 18:52:19,224 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:19,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:52:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:19,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:52:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:19,725 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-07-09 18:52:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:19,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:19,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 [2021-07-09 18:52:20,110 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:52:20,261 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-07-09 18:52:20,261 INFO L628 ElimStorePlain]: treesize reduction 62, result has 77.0 percent of original size [2021-07-09 18:52:20,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:52:20,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:2120 [2021-07-09 18:52:21,201 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 54 [2021-07-09 18:52:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633336392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:21,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:21,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-07-09 18:52:21,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346102316] [2021-07-09 18:52:21,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:52:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:52:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:52:21,361 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:22,519 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-09 18:52:26,547 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-07-09 18:52:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:26,953 INFO L93 Difference]: Finished difference Result 84175 states and 312104 transitions. [2021-07-09 18:52:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:52:26,953 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:27,265 INFO L225 Difference]: With dead ends: 84175 [2021-07-09 18:52:27,265 INFO L226 Difference]: Without dead ends: 84145 [2021-07-09 18:52:27,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 4377.7ms TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:52:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84145 states. [2021-07-09 18:52:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84145 to 50231. [2021-07-09 18:52:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50231 states, 50230 states have (on average 3.8775233923949832) internal successors, (194768), 50230 states have internal predecessors, (194768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50231 states to 50231 states and 194768 transitions. [2021-07-09 18:52:29,369 INFO L78 Accepts]: Start accepts. Automaton has 50231 states and 194768 transitions. Word has length 30 [2021-07-09 18:52:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:29,369 INFO L482 AbstractCegarLoop]: Abstraction has 50231 states and 194768 transitions. [2021-07-09 18:52:29,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 50231 states and 194768 transitions. [2021-07-09 18:52:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:29,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:29,479 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] [2021-07-09 18:52:29,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-07-09 18:52:29,695 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1339274201, now seen corresponding path program 178 times [2021-07-09 18:52:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:29,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107992770] [2021-07-09 18:52:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:30,029 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-09 18:52:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:30,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:30,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107992770] [2021-07-09 18:52:30,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107992770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:30,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928268609] [2021-07-09 18:52:30,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:30,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:52:30,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:30,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:52:30,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:30,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:30,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 13 [2021-07-09 18:52:30,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:30,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:30,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:30,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-09 18:52:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:30,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928268609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:30,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:30,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:52:30,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825315564] [2021-07-09 18:52:30,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:52:30,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:30,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:52:30,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:52:30,413 INFO L87 Difference]: Start difference. First operand 50231 states and 194768 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:32,083 INFO L93 Difference]: Finished difference Result 73610 states and 278935 transitions. [2021-07-09 18:52:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:52:32,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 30 [2021-07-09 18:52:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:32,356 INFO L225 Difference]: With dead ends: 73610 [2021-07-09 18:52:32,356 INFO L226 Difference]: Without dead ends: 73580 [2021-07-09 18:52:32,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1167.1ms TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:52:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73580 states. [2021-07-09 18:52:33,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73580 to 50288. [2021-07-09 18:52:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50288 states, 50287 states have (on average 3.876946328076839) internal successors, (194960), 50287 states have internal predecessors, (194960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50288 states to 50288 states and 194960 transitions. [2021-07-09 18:52:34,181 INFO L78 Accepts]: Start accepts. Automaton has 50288 states and 194960 transitions. Word has length 30 [2021-07-09 18:52:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:34,182 INFO L482 AbstractCegarLoop]: Abstraction has 50288 states and 194960 transitions. [2021-07-09 18:52:34,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 50288 states and 194960 transitions. [2021-07-09 18:52:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:34,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:34,280 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] [2021-07-09 18:52:34,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-07-09 18:52:34,496 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:34,496 INFO L82 PathProgramCache]: Analyzing trace with hash 927295079, now seen corresponding path program 179 times [2021-07-09 18:52:34,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:34,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394744171] [2021-07-09 18:52:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:34,922 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-07-09 18:52:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:34,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:34,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394744171] [2021-07-09 18:52:34,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394744171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:34,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655302037] [2021-07-09 18:52:34,979 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:35,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:52:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:52:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:35,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:35,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:52:35,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:35,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:35,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:35,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-07-09 18:52:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:35,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655302037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:35,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:35,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:52:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146548590] [2021-07-09 18:52:35,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:52:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:52:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:52:35,296 INFO L87 Difference]: Start difference. First operand 50288 states and 194960 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:37,750 INFO L93 Difference]: Finished difference Result 73555 states and 278809 transitions. [2021-07-09 18:52:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:52:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:38,029 INFO L225 Difference]: With dead ends: 73555 [2021-07-09 18:52:38,029 INFO L226 Difference]: Without dead ends: 73540 [2021-07-09 18:52:38,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1699.0ms TimeCoverageRelationStatistics Valid=440, Invalid=2640, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:52:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73540 states. [2021-07-09 18:52:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73540 to 50280. [2021-07-09 18:52:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50280 states, 50279 states have (on average 3.8771455279540166) internal successors, (194939), 50279 states have internal predecessors, (194939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50280 states to 50280 states and 194939 transitions. [2021-07-09 18:52:40,034 INFO L78 Accepts]: Start accepts. Automaton has 50280 states and 194939 transitions. Word has length 30 [2021-07-09 18:52:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:40,034 INFO L482 AbstractCegarLoop]: Abstraction has 50280 states and 194939 transitions. [2021-07-09 18:52:40,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 50280 states and 194939 transitions. [2021-07-09 18:52:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:40,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:40,128 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] [2021-07-09 18:52:40,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:40,344 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash -971195733, now seen corresponding path program 180 times [2021-07-09 18:52:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:40,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189608626] [2021-07-09 18:52:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:40,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:40,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189608626] [2021-07-09 18:52:40,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189608626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:40,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770392942] [2021-07-09 18:52:40,579 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:40,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:52:40,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:52:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:40,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:40,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:52:40,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:40,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:40,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:40,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-09 18:52:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:40,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770392942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:40,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:40,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:52:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483236307] [2021-07-09 18:52:40,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:52:40,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:52:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:52:40,851 INFO L87 Difference]: Start difference. First operand 50280 states and 194939 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:43,029 INFO L93 Difference]: Finished difference Result 76864 states and 288901 transitions. [2021-07-09 18:52:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:52:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:43,323 INFO L225 Difference]: With dead ends: 76864 [2021-07-09 18:52:43,323 INFO L226 Difference]: Without dead ends: 76849 [2021-07-09 18:52:43,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1376.5ms TimeCoverageRelationStatistics Valid=517, Invalid=2345, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:52:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76849 states. [2021-07-09 18:52:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76849 to 50282. [2021-07-09 18:52:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8772498558103456) internal successors, (194952), 50281 states have internal predecessors, (194952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194952 transitions. [2021-07-09 18:52:45,274 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194952 transitions. Word has length 30 [2021-07-09 18:52:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:45,274 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194952 transitions. [2021-07-09 18:52:45,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194952 transitions. [2021-07-09 18:52:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:45,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:45,366 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] [2021-07-09 18:52:45,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-07-09 18:52:45,577 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -397133013, now seen corresponding path program 181 times [2021-07-09 18:52:45,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:45,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813632432] [2021-07-09 18:52:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:45,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:45,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813632432] [2021-07-09 18:52:45,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813632432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:45,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642430537] [2021-07-09 18:52:45,740 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:52:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:46,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:46,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:46,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:46,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:52:46,046 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 25 treesize of output 13 [2021-07-09 18:52:46,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:46,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:46,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:46,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-09 18:52:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642430537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:46,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:46,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:52:46,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828954380] [2021-07-09 18:52:46,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:52:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:52:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:52:46,070 INFO L87 Difference]: Start difference. First operand 50282 states and 194952 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:46,480 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-09 18:52:48,038 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-07-09 18:52:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:51,111 INFO L93 Difference]: Finished difference Result 91774 states and 339295 transitions. [2021-07-09 18:52:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:52:51,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:51,440 INFO L225 Difference]: With dead ends: 91774 [2021-07-09 18:52:51,440 INFO L226 Difference]: Without dead ends: 91744 [2021-07-09 18:52:51,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 3259.8ms TimeCoverageRelationStatistics Valid=655, Invalid=5665, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:52:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91744 states. [2021-07-09 18:52:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91744 to 50413. [2021-07-09 18:52:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-07-09 18:52:53,599 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-07-09 18:52:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:53,599 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-07-09 18:52:53,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-07-09 18:52:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:52:53,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:53,706 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] [2021-07-09 18:52:53,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-07-09 18:52:53,922 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:53,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1812767055, now seen corresponding path program 182 times [2021-07-09 18:52:53,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:53,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952377752] [2021-07-09 18:52:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:54,101 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-09 18:52:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:54,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:54,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952377752] [2021-07-09 18:52:54,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952377752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:54,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797159587] [2021-07-09 18:52:54,208 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:52:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:54,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:52:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:54,663 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:52:54,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:52:54,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:52:54,798 INFO L628 ElimStorePlain]: treesize reduction 150, result has 31.5 percent of original size [2021-07-09 18:52:54,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:52:54,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:88 [2021-07-09 18:52:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:54,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797159587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:54,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:54,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-09 18:52:54,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850990902] [2021-07-09 18:52:54,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:52:54,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:54,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:52:54,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:52:54,883 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:56,341 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-07-09 18:52:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:57,652 INFO L93 Difference]: Finished difference Result 72565 states and 275989 transitions. [2021-07-09 18:52:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:52:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:52:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:57,897 INFO L225 Difference]: With dead ends: 72565 [2021-07-09 18:52:57,897 INFO L226 Difference]: Without dead ends: 72535 [2021-07-09 18:52:57,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1927.8ms TimeCoverageRelationStatistics Valid=404, Invalid=2352, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:52:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72535 states. [2021-07-09 18:52:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72535 to 50413. [2021-07-09 18:52:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-07-09 18:52:59,769 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-07-09 18:52:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:59,769 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-07-09 18:52:59,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-07-09 18:53:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:00,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:00,180 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] [2021-07-09 18:53:00,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-07-09 18:53:00,393 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -215630961, now seen corresponding path program 183 times [2021-07-09 18:53:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:00,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303978856] [2021-07-09 18:53:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:00,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303978856] [2021-07-09 18:53:00,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303978856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332553515] [2021-07-09 18:53:00,634 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:00,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:53:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:00,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:53:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:00,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:53:00,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:53:01,016 INFO L628 ElimStorePlain]: treesize reduction 131, result has 36.7 percent of original size [2021-07-09 18:53:01,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:53:01,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:69 [2021-07-09 18:53:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:01,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332553515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:01,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:01,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-09 18:53:01,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400003836] [2021-07-09 18:53:01,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:53:01,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:01,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:53:01,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:53:01,094 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:01,713 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-07-09 18:53:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:04,000 INFO L93 Difference]: Finished difference Result 72583 states and 276055 transitions. [2021-07-09 18:53:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:53:04,000 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:53:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:04,268 INFO L225 Difference]: With dead ends: 72583 [2021-07-09 18:53:04,268 INFO L226 Difference]: Without dead ends: 72568 [2021-07-09 18:53:04,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2106.7ms TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:53:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72568 states. [2021-07-09 18:53:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72568 to 50379. [2021-07-09 18:53:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50379 states, 50378 states have (on average 3.8765334074397555) internal successors, (195292), 50378 states have internal predecessors, (195292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50379 states to 50379 states and 195292 transitions. [2021-07-09 18:53:06,091 INFO L78 Accepts]: Start accepts. Automaton has 50379 states and 195292 transitions. Word has length 30 [2021-07-09 18:53:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:06,092 INFO L482 AbstractCegarLoop]: Abstraction has 50379 states and 195292 transitions. [2021-07-09 18:53:06,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 50379 states and 195292 transitions. [2021-07-09 18:53:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:06,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:06,189 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] [2021-07-09 18:53:06,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:06,406 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:06,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2141926627, now seen corresponding path program 184 times [2021-07-09 18:53:06,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:06,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576497877] [2021-07-09 18:53:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:06,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576497877] [2021-07-09 18:53:06,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576497877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687884694] [2021-07-09 18:53:06,572 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:06,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:53:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:53:06,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:07,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:53:07,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:07,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 13 [2021-07-09 18:53:07,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:07,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:07,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:07,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-09 18:53:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:07,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687884694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:07,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:07,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:53:07,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945258329] [2021-07-09 18:53:07,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:53:07,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:53:07,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:53:07,097 INFO L87 Difference]: Start difference. First operand 50379 states and 195292 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:09,204 INFO L93 Difference]: Finished difference Result 74068 states and 280349 transitions. [2021-07-09 18:53:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:53:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 30 [2021-07-09 18:53:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:09,492 INFO L225 Difference]: With dead ends: 74068 [2021-07-09 18:53:09,492 INFO L226 Difference]: Without dead ends: 74038 [2021-07-09 18:53:09,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1344.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2366, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:53:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74038 states. [2021-07-09 18:53:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74038 to 50389. [2021-07-09 18:53:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50389 states, 50388 states have (on average 3.8765579106136383) internal successors, (195332), 50388 states have internal predecessors, (195332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50389 states to 50389 states and 195332 transitions. [2021-07-09 18:53:11,197 INFO L78 Accepts]: Start accepts. Automaton has 50389 states and 195332 transitions. Word has length 30 [2021-07-09 18:53:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:11,197 INFO L482 AbstractCegarLoop]: Abstraction has 50389 states and 195332 transitions. [2021-07-09 18:53:11,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 50389 states and 195332 transitions. [2021-07-09 18:53:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:11,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:11,294 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] [2021-07-09 18:53:11,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:11,504 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:11,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:11,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1974117535, now seen corresponding path program 185 times [2021-07-09 18:53:11,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:11,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788786604] [2021-07-09 18:53:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:11,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:11,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788786604] [2021-07-09 18:53:11,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788786604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:11,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016916451] [2021-07-09 18:53:11,901 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:11,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:53:11,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:53:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:12,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:53:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:12,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:53:12,139 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 41 treesize of output 19 [2021-07-09 18:53:12,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:12,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:12,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:12,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:7 [2021-07-09 18:53:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:12,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016916451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:12,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:12,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-09 18:53:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91415598] [2021-07-09 18:53:12,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:53:12,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:53:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:53:12,170 INFO L87 Difference]: Start difference. First operand 50389 states and 195332 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-07-09 18:53:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:13,690 INFO L93 Difference]: Finished difference Result 60193 states and 228714 transitions. [2021-07-09 18:53:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:53:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 30 [2021-07-09 18:53:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:13,919 INFO L225 Difference]: With dead ends: 60193 [2021-07-09 18:53:13,919 INFO L226 Difference]: Without dead ends: 60178 [2021-07-09 18:53:13,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:53:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60178 states. [2021-07-09 18:53:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60178 to 50385. [2021-07-09 18:53:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50385 states, 50384 states have (on average 3.876587805652588) internal successors, (195318), 50384 states have internal predecessors, (195318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50385 states to 50385 states and 195318 transitions. [2021-07-09 18:53:15,879 INFO L78 Accepts]: Start accepts. Automaton has 50385 states and 195318 transitions. Word has length 30 [2021-07-09 18:53:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:15,879 INFO L482 AbstractCegarLoop]: Abstraction has 50385 states and 195318 transitions. [2021-07-09 18:53:15,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-07-09 18:53:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 50385 states and 195318 transitions. [2021-07-09 18:53:15,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:15,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:15,984 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] [2021-07-09 18:53:16,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-07-09 18:53:16,200 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash -93398493, now seen corresponding path program 186 times [2021-07-09 18:53:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:16,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029508081] [2021-07-09 18:53:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:16,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029508081] [2021-07-09 18:53:16,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029508081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378149771] [2021-07-09 18:53:16,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:16,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:53:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:53:16,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:16,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:16,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 61 [2021-07-09 18:53:16,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:53:16,747 INFO L628 ElimStorePlain]: treesize reduction 242, result has 13.3 percent of original size [2021-07-09 18:53:16,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:16,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:55 [2021-07-09 18:53:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:16,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378149771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:16,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:16,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-07-09 18:53:16,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931526035] [2021-07-09 18:53:16,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:53:16,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:53:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:53:16,902 INFO L87 Difference]: Start difference. First operand 50385 states and 195318 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:21,436 INFO L93 Difference]: Finished difference Result 78681 states and 297156 transitions. [2021-07-09 18:53:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:53:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:53:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:21,945 INFO L225 Difference]: With dead ends: 78681 [2021-07-09 18:53:21,946 INFO L226 Difference]: Without dead ends: 78666 [2021-07-09 18:53:21,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3048.1ms TimeCoverageRelationStatistics Valid=1045, Invalid=6611, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:53:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78666 states. [2021-07-09 18:53:23,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78666 to 50388. [2021-07-09 18:53:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50388 states, 50387 states have (on average 3.876654692678667) internal successors, (195333), 50387 states have internal predecessors, (195333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50388 states to 50388 states and 195333 transitions. [2021-07-09 18:53:23,895 INFO L78 Accepts]: Start accepts. Automaton has 50388 states and 195333 transitions. Word has length 30 [2021-07-09 18:53:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:23,895 INFO L482 AbstractCegarLoop]: Abstraction has 50388 states and 195333 transitions. [2021-07-09 18:53:23,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50388 states and 195333 transitions. [2021-07-09 18:53:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:23,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:23,991 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] [2021-07-09 18:53:24,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-07-09 18:53:24,207 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:24,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:24,207 INFO L82 PathProgramCache]: Analyzing trace with hash -590119853, now seen corresponding path program 187 times [2021-07-09 18:53:24,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:24,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136987677] [2021-07-09 18:53:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:24,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:24,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136987677] [2021-07-09 18:53:24,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136987677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:24,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970926261] [2021-07-09 18:53:24,477 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:53:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:24,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:53:24,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:24,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 13 [2021-07-09 18:53:24,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:24,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:24,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:24,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-09 18:53:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:24,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970926261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:24,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:24,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:53:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586817800] [2021-07-09 18:53:24,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:53:24,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:53:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:53:24,794 INFO L87 Difference]: Start difference. First operand 50388 states and 195333 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:26,928 INFO L93 Difference]: Finished difference Result 77532 states and 294234 transitions. [2021-07-09 18:53:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:53:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:53:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:27,181 INFO L225 Difference]: With dead ends: 77532 [2021-07-09 18:53:27,181 INFO L226 Difference]: Without dead ends: 77517 [2021-07-09 18:53:27,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:53:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77517 states. [2021-07-09 18:53:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77517 to 50404. [2021-07-09 18:53:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50404 states, 50403 states have (on average 3.8768724083883894) internal successors, (195406), 50403 states have internal predecessors, (195406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50404 states to 50404 states and 195406 transitions. [2021-07-09 18:53:29,381 INFO L78 Accepts]: Start accepts. Automaton has 50404 states and 195406 transitions. Word has length 30 [2021-07-09 18:53:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:29,382 INFO L482 AbstractCegarLoop]: Abstraction has 50404 states and 195406 transitions. [2021-07-09 18:53:29,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 50404 states and 195406 transitions. [2021-07-09 18:53:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:29,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:29,472 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] [2021-07-09 18:53:29,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-07-09 18:53:29,687 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2087314663, now seen corresponding path program 188 times [2021-07-09 18:53:29,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:29,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407735158] [2021-07-09 18:53:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:29,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:29,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407735158] [2021-07-09 18:53:29,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407735158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:29,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384912729] [2021-07-09 18:53:29,851 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:29,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:53:29,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:53:29,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:30,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 37 [2021-07-09 18:53:30,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:53:30,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:30,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:53:30,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-07-09 18:53:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:30,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384912729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:30,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:30,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:53:30,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011522314] [2021-07-09 18:53:30,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:53:30,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:53:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:53:30,150 INFO L87 Difference]: Start difference. First operand 50404 states and 195406 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2021-07-09 18:53:30,753 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-07-09 18:53:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:33,117 INFO L93 Difference]: Finished difference Result 79064 states and 298479 transitions. [2021-07-09 18:53:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:53:33,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-07-09 18:53:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:33,616 INFO L225 Difference]: With dead ends: 79064 [2021-07-09 18:53:33,617 INFO L226 Difference]: Without dead ends: 79034 [2021-07-09 18:53:33,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2079.8ms TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:53:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79034 states. [2021-07-09 18:53:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79034 to 50410. [2021-07-09 18:53:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50410 states, 50409 states have (on average 3.876986252454919) internal successors, (195435), 50409 states have internal predecessors, (195435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50410 states to 50410 states and 195435 transitions. [2021-07-09 18:53:35,610 INFO L78 Accepts]: Start accepts. Automaton has 50410 states and 195435 transitions. Word has length 30 [2021-07-09 18:53:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:35,610 INFO L482 AbstractCegarLoop]: Abstraction has 50410 states and 195435 transitions. [2021-07-09 18:53:35,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2021-07-09 18:53:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50410 states and 195435 transitions. [2021-07-09 18:53:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:35,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:35,779 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] [2021-07-09 18:53:35,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:35,995 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:35,995 INFO L82 PathProgramCache]: Analyzing trace with hash 304550503, now seen corresponding path program 189 times [2021-07-09 18:53:35,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:35,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108234490] [2021-07-09 18:53:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:36,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:36,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108234490] [2021-07-09 18:53:36,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108234490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:36,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461641308] [2021-07-09 18:53:36,219 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:36,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:53:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:36,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:53:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:36,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:36,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:53:36,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:53:36,631 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-07-09 18:53:36,631 INFO L628 ElimStorePlain]: treesize reduction 150, result has 35.9 percent of original size [2021-07-09 18:53:36,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:53:36,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:94 [2021-07-09 18:53:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:36,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461641308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:36,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:36,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-09 18:53:36,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604795653] [2021-07-09 18:53:36,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:53:36,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:53:36,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:53:36,719 INFO L87 Difference]: Start difference. First operand 50410 states and 195435 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:40,550 INFO L93 Difference]: Finished difference Result 78571 states and 297050 transitions. [2021-07-09 18:53:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:53:40,550 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:53:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:40,837 INFO L225 Difference]: With dead ends: 78571 [2021-07-09 18:53:40,837 INFO L226 Difference]: Without dead ends: 78556 [2021-07-09 18:53:40,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2631.1ms TimeCoverageRelationStatistics Valid=709, Invalid=3847, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:53:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78556 states. [2021-07-09 18:53:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78556 to 50420. [2021-07-09 18:53:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50420 states, 50419 states have (on average 3.8771296535036397) internal successors, (195481), 50419 states have internal predecessors, (195481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50420 states to 50420 states and 195481 transitions. [2021-07-09 18:53:43,058 INFO L78 Accepts]: Start accepts. Automaton has 50420 states and 195481 transitions. Word has length 30 [2021-07-09 18:53:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:43,059 INFO L482 AbstractCegarLoop]: Abstraction has 50420 states and 195481 transitions. [2021-07-09 18:53:43,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 50420 states and 195481 transitions. [2021-07-09 18:53:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:43,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:43,152 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] [2021-07-09 18:53:43,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:43,359 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash 878613223, now seen corresponding path program 190 times [2021-07-09 18:53:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:43,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743660073] [2021-07-09 18:53:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:43,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:43,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743660073] [2021-07-09 18:53:43,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743660073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:43,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897082870] [2021-07-09 18:53:43,517 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:43,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:53:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:43,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:53:43,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:43,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:43,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:53:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:43,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:53:43,840 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 25 treesize of output 13 [2021-07-09 18:53:43,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:43,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:43,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:43,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-09 18:53:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:43,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897082870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:43,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:43,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:53:43,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82311824] [2021-07-09 18:53:43,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:53:43,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:43,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:53:43,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:53:43,866 INFO L87 Difference]: Start difference. First operand 50420 states and 195481 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:45,894 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 18:53:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:50,236 INFO L93 Difference]: Finished difference Result 96588 states and 356674 transitions. [2021-07-09 18:53:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:53:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:53:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:50,809 INFO L225 Difference]: With dead ends: 96588 [2021-07-09 18:53:50,810 INFO L226 Difference]: Without dead ends: 96543 [2021-07-09 18:53:50,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 4298.2ms TimeCoverageRelationStatistics Valid=1133, Invalid=8373, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 18:53:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96543 states. [2021-07-09 18:53:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96543 to 50456. [2021-07-09 18:53:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.877653354474284) internal successors, (195647), 50455 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195647 transitions. [2021-07-09 18:53:52,998 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195647 transitions. Word has length 30 [2021-07-09 18:53:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:52,999 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195647 transitions. [2021-07-09 18:53:52,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195647 transitions. [2021-07-09 18:53:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:53,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:53,118 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] [2021-07-09 18:53:53,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:53,323 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash 276888099, now seen corresponding path program 191 times [2021-07-09 18:53:53,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:53,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491763925] [2021-07-09 18:53:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:53,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:53,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491763925] [2021-07-09 18:53:53,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491763925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:53,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817540887] [2021-07-09 18:53:53,485 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:53,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:53:53,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:53:53,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:53:53,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:53,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 37 [2021-07-09 18:53:53,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:53:53,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:53,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:53:53,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-07-09 18:53:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:53,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817540887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:53,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:53,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:53:53,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250961283] [2021-07-09 18:53:53,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:53:53,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:53,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:53:53,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:53:53,778 INFO L87 Difference]: Start difference. First operand 50456 states and 195647 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2021-07-09 18:53:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:56,597 INFO L93 Difference]: Finished difference Result 81340 states and 306603 transitions. [2021-07-09 18:53:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:53:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-07-09 18:53:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:57,110 INFO L225 Difference]: With dead ends: 81340 [2021-07-09 18:53:57,110 INFO L226 Difference]: Without dead ends: 81310 [2021-07-09 18:53:57,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1506.3ms TimeCoverageRelationStatistics Valid=729, Invalid=2931, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:53:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81310 states. [2021-07-09 18:53:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81310 to 50462. [2021-07-09 18:53:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50462 states, 50461 states have (on average 3.877945343928975) internal successors, (195685), 50461 states have internal predecessors, (195685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:53:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50462 states to 50462 states and 195685 transitions. [2021-07-09 18:53:58,925 INFO L78 Accepts]: Start accepts. Automaton has 50462 states and 195685 transitions. Word has length 30 [2021-07-09 18:53:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:58,925 INFO L482 AbstractCegarLoop]: Abstraction has 50462 states and 195685 transitions. [2021-07-09 18:53:58,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2021-07-09 18:53:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 50462 states and 195685 transitions. [2021-07-09 18:53:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:53:59,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:59,336 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] [2021-07-09 18:53:59,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:59,552 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash 297624627, now seen corresponding path program 192 times [2021-07-09 18:53:59,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:59,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945574213] [2021-07-09 18:53:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:59,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:59,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945574213] [2021-07-09 18:53:59,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945574213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:59,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108538831] [2021-07-09 18:53:59,799 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:59,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:53:59,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:59,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:53:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:00,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:00,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:00,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:00,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:00,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:00,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-07-09 18:54:00,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:54:00,119 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.7 percent of original size [2021-07-09 18:54:00,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:54:00,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:35 [2021-07-09 18:54:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:00,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108538831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:00,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:00,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-07-09 18:54:00,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793877130] [2021-07-09 18:54:00,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:54:00,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:00,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:54:00,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:54:00,162 INFO L87 Difference]: Start difference. First operand 50462 states and 195685 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:00,903 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-07-09 18:54:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:03,524 INFO L93 Difference]: Finished difference Result 79161 states and 299995 transitions. [2021-07-09 18:54:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:54:03,524 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:54:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:04,201 INFO L225 Difference]: With dead ends: 79161 [2021-07-09 18:54:04,201 INFO L226 Difference]: Without dead ends: 79131 [2021-07-09 18:54:04,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2296.3ms TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:54:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79131 states. [2021-07-09 18:54:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79131 to 50460. [2021-07-09 18:54:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50460 states, 50459 states have (on average 3.877960324223627) internal successors, (195678), 50459 states have internal predecessors, (195678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50460 states to 50460 states and 195678 transitions. [2021-07-09 18:54:06,147 INFO L78 Accepts]: Start accepts. Automaton has 50460 states and 195678 transitions. Word has length 30 [2021-07-09 18:54:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:06,147 INFO L482 AbstractCegarLoop]: Abstraction has 50460 states and 195678 transitions. [2021-07-09 18:54:06,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 50460 states and 195678 transitions. [2021-07-09 18:54:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:54:06,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:06,564 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] [2021-07-09 18:54:06,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-07-09 18:54:06,779 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:06,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2080925591, now seen corresponding path program 193 times [2021-07-09 18:54:06,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:06,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680663222] [2021-07-09 18:54:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:06,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680663222] [2021-07-09 18:54:06,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680663222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145571220] [2021-07-09 18:54:06,938 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:54:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:07,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:07,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:07,227 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 25 treesize of output 13 [2021-07-09 18:54:07,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:07,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:07,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:54:07,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-09 18:54:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:07,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145571220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:07,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:07,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:54:07,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922040101] [2021-07-09 18:54:07,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:54:07,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:07,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:54:07,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:54:07,250 INFO L87 Difference]: Start difference. First operand 50460 states and 195678 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:08,224 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-07-09 18:54:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:12,917 INFO L93 Difference]: Finished difference Result 95802 states and 354482 transitions. [2021-07-09 18:54:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:54:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:54:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:13,271 INFO L225 Difference]: With dead ends: 95802 [2021-07-09 18:54:13,271 INFO L226 Difference]: Without dead ends: 95757 [2021-07-09 18:54:13,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 3928.7ms TimeCoverageRelationStatistics Valid=1115, Invalid=7441, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:54:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95757 states. [2021-07-09 18:54:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95757 to 50464. [2021-07-09 18:54:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50464 states, 50463 states have (on average 3.8779898143194025) internal successors, (195695), 50463 states have internal predecessors, (195695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50464 states to 50464 states and 195695 transitions. [2021-07-09 18:54:15,454 INFO L78 Accepts]: Start accepts. Automaton has 50464 states and 195695 transitions. Word has length 30 [2021-07-09 18:54:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:15,454 INFO L482 AbstractCegarLoop]: Abstraction has 50464 states and 195695 transitions. [2021-07-09 18:54:15,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 50464 states and 195695 transitions. [2021-07-09 18:54:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:54:15,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:15,561 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] [2021-07-09 18:54:15,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:15,774 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash -380393053, now seen corresponding path program 194 times [2021-07-09 18:54:15,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:15,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817806849] [2021-07-09 18:54:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:15,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:15,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817806849] [2021-07-09 18:54:15,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817806849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:15,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461551901] [2021-07-09 18:54:15,964 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:15,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:54:15,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:54:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:16,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:16,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:16,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-07-09 18:54:16,355 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:54:16,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:16,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:54:16,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-07-09 18:54:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:16,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461551901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:16,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:16,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:54:16,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116839675] [2021-07-09 18:54:16,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:54:16,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:54:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:54:16,399 INFO L87 Difference]: Start difference. First operand 50464 states and 195695 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:22,134 INFO L93 Difference]: Finished difference Result 97872 states and 363697 transitions. [2021-07-09 18:54:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:54:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:54:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:22,664 INFO L225 Difference]: With dead ends: 97872 [2021-07-09 18:54:22,664 INFO L226 Difference]: Without dead ends: 97842 [2021-07-09 18:54:22,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 3960.1ms TimeCoverageRelationStatistics Valid=1175, Invalid=8725, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:54:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97842 states. [2021-07-09 18:54:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97842 to 50467. [2021-07-09 18:54:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 50466 states have (on average 3.8780565132960807) internal successors, (195710), 50466 states have internal predecessors, (195710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 195710 transitions. [2021-07-09 18:54:24,957 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 195710 transitions. Word has length 30 [2021-07-09 18:54:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:24,957 INFO L482 AbstractCegarLoop]: Abstraction has 50467 states and 195710 transitions. [2021-07-09 18:54:24,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 195710 transitions. [2021-07-09 18:54:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:54:25,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:25,056 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] [2021-07-09 18:54:25,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:25,272 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:25,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:25,272 INFO L82 PathProgramCache]: Analyzing trace with hash -303306601, now seen corresponding path program 195 times [2021-07-09 18:54:25,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:25,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745920976] [2021-07-09 18:54:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:25,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:25,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745920976] [2021-07-09 18:54:25,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745920976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:25,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703998536] [2021-07-09 18:54:25,554 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:25,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:54:25,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:54:25,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:25,916 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-07-09 18:54:26,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:26,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-09 18:54:26,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:54:26,178 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-07-09 18:54:26,178 INFO L628 ElimStorePlain]: treesize reduction 131, result has 37.9 percent of original size [2021-07-09 18:54:26,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:54:26,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:90 [2021-07-09 18:54:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:26,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703998536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:26,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:26,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-09 18:54:26,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804598767] [2021-07-09 18:54:26,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:54:26,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:54:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:54:26,264 INFO L87 Difference]: Start difference. First operand 50467 states and 195710 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:29,349 INFO L93 Difference]: Finished difference Result 73646 states and 278776 transitions. [2021-07-09 18:54:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:54:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:54:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:29,624 INFO L225 Difference]: With dead ends: 73646 [2021-07-09 18:54:29,624 INFO L226 Difference]: Without dead ends: 73631 [2021-07-09 18:54:29,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2342.1ms TimeCoverageRelationStatistics Valid=459, Invalid=2621, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:54:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73631 states. [2021-07-09 18:54:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73631 to 50482. [2021-07-09 18:54:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50482 states, 50481 states have (on average 3.878171985499495) internal successors, (195774), 50481 states have internal predecessors, (195774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50482 states to 50482 states and 195774 transitions. [2021-07-09 18:54:31,521 INFO L78 Accepts]: Start accepts. Automaton has 50482 states and 195774 transitions. Word has length 30 [2021-07-09 18:54:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:31,521 INFO L482 AbstractCegarLoop]: Abstraction has 50482 states and 195774 transitions. [2021-07-09 18:54:31,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 50482 states and 195774 transitions. [2021-07-09 18:54:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:54:31,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:31,625 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] [2021-07-09 18:54:31,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-07-09 18:54:31,840 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:31,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash 270756119, now seen corresponding path program 196 times [2021-07-09 18:54:31,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:31,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173030756] [2021-07-09 18:54:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:31,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:31,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173030756] [2021-07-09 18:54:31,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173030756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:31,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750717421] [2021-07-09 18:54:31,977 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:32,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:54:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:32,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:54:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:32,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:32,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:32,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:32,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:32,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:32,501 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 25 treesize of output 13 [2021-07-09 18:54:32,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:32,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:32,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:54:32,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-09 18:54:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:32,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750717421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:32,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:32,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:54:32,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612704153] [2021-07-09 18:54:32,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:54:32,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:32,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:54:32,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:54:32,529 INFO L87 Difference]: Start difference. First operand 50482 states and 195774 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:38,337 INFO L93 Difference]: Finished difference Result 89554 states and 331893 transitions. [2021-07-09 18:54:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:54:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:54:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:38,656 INFO L225 Difference]: With dead ends: 89554 [2021-07-09 18:54:38,656 INFO L226 Difference]: Without dead ends: 89509 [2021-07-09 18:54:38,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 4036.7ms TimeCoverageRelationStatistics Valid=898, Invalid=7474, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:54:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89509 states. [2021-07-09 18:54:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89509 to 50513. [2021-07-09 18:54:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50513 states, 50512 states have (on average 3.8782467532467533) internal successors, (195898), 50512 states have internal predecessors, (195898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50513 states to 50513 states and 195898 transitions. [2021-07-09 18:54:40,873 INFO L78 Accepts]: Start accepts. Automaton has 50513 states and 195898 transitions. Word has length 30 [2021-07-09 18:54:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:40,873 INFO L482 AbstractCegarLoop]: Abstraction has 50513 states and 195898 transitions. [2021-07-09 18:54:40,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 50513 states and 195898 transitions. [2021-07-09 18:54:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:54:40,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:40,969 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] [2021-07-09 18:54:41,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:41,185 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1364847707, now seen corresponding path program 197 times [2021-07-09 18:54:41,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:41,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614642497] [2021-07-09 18:54:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:41,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:41,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614642497] [2021-07-09 18:54:41,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614642497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:41,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718620834] [2021-07-09 18:54:41,338 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:41,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:54:41,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:41,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:54:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:41,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:41,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:41,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:41,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-07-09 18:54:41,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:54:41,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:41,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:54:41,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-07-09 18:54:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:41,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718620834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:41,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:41,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:54:41,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557141769] [2021-07-09 18:54:41,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:54:41,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:54:41,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:54:41,828 INFO L87 Difference]: Start difference. First operand 50513 states and 195898 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:48,270 INFO L93 Difference]: Finished difference Result 88714 states and 329526 transitions. [2021-07-09 18:54:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:54:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:54:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:48,584 INFO L225 Difference]: With dead ends: 88714 [2021-07-09 18:54:48,584 INFO L226 Difference]: Without dead ends: 88684 [2021-07-09 18:54:48,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4468.0ms TimeCoverageRelationStatistics Valid=976, Invalid=10366, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 18:54:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88684 states. [2021-07-09 18:54:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88684 to 50507. [2021-07-09 18:54:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50507 states, 50506 states have (on average 3.8780936918385933) internal successors, (195867), 50506 states have internal predecessors, (195867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50507 states to 50507 states and 195867 transitions. [2021-07-09 18:54:50,717 INFO L78 Accepts]: Start accepts. Automaton has 50507 states and 195867 transitions. Word has length 30 [2021-07-09 18:54:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:50,717 INFO L482 AbstractCegarLoop]: Abstraction has 50507 states and 195867 transitions. [2021-07-09 18:54:50,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 50507 states and 195867 transitions. [2021-07-09 18:54:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:54:50,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:50,812 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] [2021-07-09 18:54:51,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-07-09 18:54:51,015 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:51,015 INFO L82 PathProgramCache]: Analyzing trace with hash -781323053, now seen corresponding path program 198 times [2021-07-09 18:54:51,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:51,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295300646] [2021-07-09 18:54:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:51,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:51,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295300646] [2021-07-09 18:54:51,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295300646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:51,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362411908] [2021-07-09 18:54:51,149 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:51,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:54:51,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:51,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:54:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:51,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,814 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 27 treesize of output 13 [2021-07-09 18:54:51,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:51,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-09 18:54:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:51,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362411908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:51,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:51,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:54:51,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955333958] [2021-07-09 18:54:51,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:54:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:54:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:54:51,839 INFO L87 Difference]: Start difference. First operand 50507 states and 195867 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:53,202 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:54:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:57,253 INFO L93 Difference]: Finished difference Result 99478 states and 365820 transitions. [2021-07-09 18:54:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:54:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:54:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:57,803 INFO L225 Difference]: With dead ends: 99478 [2021-07-09 18:54:57,803 INFO L226 Difference]: Without dead ends: 99448 [2021-07-09 18:54:57,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 4108.5ms TimeCoverageRelationStatistics Valid=1062, Invalid=7868, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 18:54:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99448 states. [2021-07-09 18:54:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99448 to 50525. [2021-07-09 18:54:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50525 states, 50524 states have (on average 3.8780777452299895) internal successors, (195936), 50524 states have internal predecessors, (195936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50525 states to 50525 states and 195936 transitions. [2021-07-09 18:54:59,752 INFO L78 Accepts]: Start accepts. Automaton has 50525 states and 195936 transitions. Word has length 30 [2021-07-09 18:54:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:59,752 INFO L482 AbstractCegarLoop]: Abstraction has 50525 states and 195936 transitions. [2021-07-09 18:54:59,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 50525 states and 195936 transitions. [2021-07-09 18:54:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:54:59,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:59,835 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] [2021-07-09 18:55:00,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:00,049 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash 25852971, now seen corresponding path program 199 times [2021-07-09 18:55:00,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:00,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802267111] [2021-07-09 18:55:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:00,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:00,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802267111] [2021-07-09 18:55:00,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802267111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:00,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904684595] [2021-07-09 18:55:00,336 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:00,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:55:00,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:00,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:00,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:00,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:55:00,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:55:00,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:00,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:00,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-09 18:55:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:00,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904684595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:00,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:00,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:55:00,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281082239] [2021-07-09 18:55:00,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:55:00,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:55:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:55:00,596 INFO L87 Difference]: Start difference. First operand 50525 states and 195936 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:01,096 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:55:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:02,966 INFO L93 Difference]: Finished difference Result 77721 states and 294719 transitions. [2021-07-09 18:55:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:55:02,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:55:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:03,248 INFO L225 Difference]: With dead ends: 77721 [2021-07-09 18:55:03,248 INFO L226 Difference]: Without dead ends: 77706 [2021-07-09 18:55:03,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1632.0ms TimeCoverageRelationStatistics Valid=400, Invalid=1670, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:55:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77706 states. [2021-07-09 18:55:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77706 to 50552. [2021-07-09 18:55:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50552 states, 50551 states have (on average 3.878043955609187) internal successors, (196039), 50551 states have internal predecessors, (196039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50552 states to 50552 states and 196039 transitions. [2021-07-09 18:55:05,302 INFO L78 Accepts]: Start accepts. Automaton has 50552 states and 196039 transitions. Word has length 30 [2021-07-09 18:55:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:05,302 INFO L482 AbstractCegarLoop]: Abstraction has 50552 states and 196039 transitions. [2021-07-09 18:55:05,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:05,302 INFO L276 IsEmpty]: Start isEmpty. Operand 50552 states and 196039 transitions. [2021-07-09 18:55:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:05,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:05,392 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] [2021-07-09 18:55:05,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-07-09 18:55:05,605 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:05,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1615723347, now seen corresponding path program 200 times [2021-07-09 18:55:05,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:05,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565394367] [2021-07-09 18:55:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:06,173 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-07-09 18:55:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:06,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:06,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565394367] [2021-07-09 18:55:06,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565394367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:06,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762639411] [2021-07-09 18:55:06,229 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:06,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:55:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:55:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:06,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:06,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:06,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-07-09 18:55:06,414 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:55:06,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:06,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:06,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-09 18:55:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:06,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762639411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:06,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:06,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:55:06,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449054917] [2021-07-09 18:55:06,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:55:06,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:06,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:55:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:55:06,455 INFO L87 Difference]: Start difference. First operand 50552 states and 196039 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:09,282 INFO L93 Difference]: Finished difference Result 77561 states and 294327 transitions. [2021-07-09 18:55:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:55:09,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 30 [2021-07-09 18:55:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:09,530 INFO L225 Difference]: With dead ends: 77561 [2021-07-09 18:55:09,530 INFO L226 Difference]: Without dead ends: 77546 [2021-07-09 18:55:09,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2133.9ms TimeCoverageRelationStatistics Valid=480, Invalid=2600, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:55:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77546 states. [2021-07-09 18:55:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77546 to 50543. [2021-07-09 18:55:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50543 states, 50542 states have (on average 3.8782596652289185) internal successors, (196015), 50542 states have internal predecessors, (196015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50543 states to 50543 states and 196015 transitions. [2021-07-09 18:55:11,266 INFO L78 Accepts]: Start accepts. Automaton has 50543 states and 196015 transitions. Word has length 30 [2021-07-09 18:55:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:11,266 INFO L482 AbstractCegarLoop]: Abstraction has 50543 states and 196015 transitions. [2021-07-09 18:55:11,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 50543 states and 196015 transitions. [2021-07-09 18:55:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:11,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:11,354 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] [2021-07-09 18:55:11,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:11,568 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2130621987, now seen corresponding path program 201 times [2021-07-09 18:55:11,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:11,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135906185] [2021-07-09 18:55:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:11,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:11,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135906185] [2021-07-09 18:55:11,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135906185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:11,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213852555] [2021-07-09 18:55:11,718 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:11,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:55:11,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:55:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:11,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:11,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:11,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:11,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 57 [2021-07-09 18:55:11,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:55:11,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:11,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:11,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-07-09 18:55:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:12,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213852555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:12,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:12,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:55:12,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111362354] [2021-07-09 18:55:12,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:55:12,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:55:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:55:12,037 INFO L87 Difference]: Start difference. First operand 50543 states and 196015 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:14,565 INFO L93 Difference]: Finished difference Result 98552 states and 363159 transitions. [2021-07-09 18:55:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:55:14,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:55:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:15,327 INFO L225 Difference]: With dead ends: 98552 [2021-07-09 18:55:15,327 INFO L226 Difference]: Without dead ends: 98537 [2021-07-09 18:55:15,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1462.9ms TimeCoverageRelationStatistics Valid=415, Invalid=2555, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:55:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98537 states. [2021-07-09 18:55:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98537 to 50554. [2021-07-09 18:55:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50554 states, 50553 states have (on average 3.8781872490257747) internal successors, (196054), 50553 states have internal predecessors, (196054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50554 states to 50554 states and 196054 transitions. [2021-07-09 18:55:17,813 INFO L78 Accepts]: Start accepts. Automaton has 50554 states and 196054 transitions. Word has length 30 [2021-07-09 18:55:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:17,813 INFO L482 AbstractCegarLoop]: Abstraction has 50554 states and 196054 transitions. [2021-07-09 18:55:17,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 50554 states and 196054 transitions. [2021-07-09 18:55:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:17,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:17,908 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] [2021-07-09 18:55:18,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-09 18:55:18,124 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash 636714265, now seen corresponding path program 202 times [2021-07-09 18:55:18,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:18,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297905541] [2021-07-09 18:55:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:18,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297905541] [2021-07-09 18:55:18,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297905541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404234238] [2021-07-09 18:55:18,272 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:18,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:55:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:55:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:18,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:18,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:18,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:18,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:18,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:18,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:18,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:18,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:18,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:18,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:55:18,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:55:18,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:18,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:18,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:15 [2021-07-09 18:55:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:18,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404234238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:18,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:18,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:55:18,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192513872] [2021-07-09 18:55:18,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:55:18,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:18,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:55:18,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:55:18,643 INFO L87 Difference]: Start difference. First operand 50554 states and 196054 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:24,126 INFO L93 Difference]: Finished difference Result 87806 states and 326906 transitions. [2021-07-09 18:55:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:55:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 30 [2021-07-09 18:55:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:24,511 INFO L225 Difference]: With dead ends: 87806 [2021-07-09 18:55:24,511 INFO L226 Difference]: Without dead ends: 87758 [2021-07-09 18:55:24,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 3324.9ms TimeCoverageRelationStatistics Valid=870, Invalid=6270, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:55:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87758 states. [2021-07-09 18:55:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87758 to 50572. [2021-07-09 18:55:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50572 states, 50571 states have (on average 3.877854897075399) internal successors, (196107), 50571 states have internal predecessors, (196107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50572 states to 50572 states and 196107 transitions. [2021-07-09 18:55:26,673 INFO L78 Accepts]: Start accepts. Automaton has 50572 states and 196107 transitions. Word has length 30 [2021-07-09 18:55:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:26,673 INFO L482 AbstractCegarLoop]: Abstraction has 50572 states and 196107 transitions. [2021-07-09 18:55:26,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 50572 states and 196107 transitions. [2021-07-09 18:55:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:26,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:26,771 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] [2021-07-09 18:55:26,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:26,985 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1155811945, now seen corresponding path program 203 times [2021-07-09 18:55:26,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:26,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520231426] [2021-07-09 18:55:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:27,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:27,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520231426] [2021-07-09 18:55:27,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520231426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:27,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993666055] [2021-07-09 18:55:27,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:27,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:55:27,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:27,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:55:27,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:27,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:27,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:27,435 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 25 treesize of output 13 [2021-07-09 18:55:27,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:55:27,751 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-09 18:55:27,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:27,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:27,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-09 18:55:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:27,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993666055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:27,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:27,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:55:27,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135527003] [2021-07-09 18:55:27,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:55:27,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:55:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:55:27,767 INFO L87 Difference]: Start difference. First operand 50572 states and 196107 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:33,117 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 18:55:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:33,860 INFO L93 Difference]: Finished difference Result 99700 states and 367419 transitions. [2021-07-09 18:55:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:55:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:55:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:34,536 INFO L225 Difference]: With dead ends: 99700 [2021-07-09 18:55:34,536 INFO L226 Difference]: Without dead ends: 99670 [2021-07-09 18:55:34,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4222.0ms TimeCoverageRelationStatistics Valid=1197, Invalid=7545, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:55:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99670 states. [2021-07-09 18:55:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99670 to 50590. [2021-07-09 18:55:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-07-09 18:55:36,684 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-07-09 18:55:36,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:36,684 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-07-09 18:55:36,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:36,684 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-07-09 18:55:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:36,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:36,770 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] [2021-07-09 18:55:36,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:36,986 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1521622571, now seen corresponding path program 204 times [2021-07-09 18:55:36,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:36,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142487354] [2021-07-09 18:55:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:37,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:37,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142487354] [2021-07-09 18:55:37,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142487354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:37,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703498638] [2021-07-09 18:55:37,137 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:37,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:55:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:37,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:55:37,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:37,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:37,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 67 [2021-07-09 18:55:37,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:55:37,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:37,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:37,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-07-09 18:55:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703498638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:37,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:37,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:55:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696004751] [2021-07-09 18:55:37,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:55:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:55:37,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:55:37,467 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:42,157 INFO L93 Difference]: Finished difference Result 97442 states and 361782 transitions. [2021-07-09 18:55:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:55:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:55:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:42,599 INFO L225 Difference]: With dead ends: 97442 [2021-07-09 18:55:42,599 INFO L226 Difference]: Without dead ends: 97427 [2021-07-09 18:55:42,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 2929.9ms TimeCoverageRelationStatistics Valid=921, Invalid=5241, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:55:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97427 states. [2021-07-09 18:55:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97427 to 50590. [2021-07-09 18:55:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-07-09 18:55:44,568 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-07-09 18:55:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:44,568 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-07-09 18:55:44,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-07-09 18:55:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:44,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:44,655 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] [2021-07-09 18:55:44,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:44,875 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -725796723, now seen corresponding path program 205 times [2021-07-09 18:55:44,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:44,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648978540] [2021-07-09 18:55:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:45,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648978540] [2021-07-09 18:55:45,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648978540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615351127] [2021-07-09 18:55:45,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:55:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:45,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:45,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:45,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-07-09 18:55:45,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:55:45,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:45,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:45,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-07-09 18:55:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:45,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615351127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:45,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:45,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:55:45,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246315347] [2021-07-09 18:55:45,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:55:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:55:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:55:45,535 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:47,247 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-07-09 18:55:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:49,012 INFO L93 Difference]: Finished difference Result 74459 states and 279252 transitions. [2021-07-09 18:55:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:55:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:55:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:49,250 INFO L225 Difference]: With dead ends: 74459 [2021-07-09 18:55:49,250 INFO L226 Difference]: Without dead ends: 74429 [2021-07-09 18:55:49,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2861.5ms TimeCoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:55:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74429 states. [2021-07-09 18:55:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74429 to 50603. [2021-07-09 18:55:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50603 states, 50602 states have (on average 3.878364491522074) internal successors, (196253), 50602 states have internal predecessors, (196253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50603 states to 50603 states and 196253 transitions. [2021-07-09 18:55:50,961 INFO L78 Accepts]: Start accepts. Automaton has 50603 states and 196253 transitions. Word has length 30 [2021-07-09 18:55:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:50,961 INFO L482 AbstractCegarLoop]: Abstraction has 50603 states and 196253 transitions. [2021-07-09 18:55:50,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 50603 states and 196253 transitions. [2021-07-09 18:55:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:51,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:51,055 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] [2021-07-09 18:55:51,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:51,270 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:51,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1490477859, now seen corresponding path program 206 times [2021-07-09 18:55:51,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:51,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906916249] [2021-07-09 18:55:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:51,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:51,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906916249] [2021-07-09 18:55:51,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906916249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:51,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256139673] [2021-07-09 18:55:51,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:51,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:55:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:55:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:55:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:51,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:51,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:51,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:51,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:51,934 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 27 treesize of output 13 [2021-07-09 18:55:51,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:55:51,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:51,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:51,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-09 18:55:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:51,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256139673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:51,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:51,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:55:51,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203675883] [2021-07-09 18:55:51,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:55:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:55:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:55:51,957 INFO L87 Difference]: Start difference. First operand 50603 states and 196253 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:56,392 INFO L93 Difference]: Finished difference Result 88595 states and 329278 transitions. [2021-07-09 18:55:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:55:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:55:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:56,665 INFO L225 Difference]: With dead ends: 88595 [2021-07-09 18:55:56,666 INFO L226 Difference]: Without dead ends: 88580 [2021-07-09 18:55:56,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 3077.4ms TimeCoverageRelationStatistics Valid=752, Invalid=6054, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:55:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88580 states. [2021-07-09 18:55:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88580 to 50612. [2021-07-09 18:55:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-07-09 18:55:58,571 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-07-09 18:55:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:58,571 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-07-09 18:55:58,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-07-09 18:55:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:55:58,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:58,658 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:58,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-07-09 18:55:58,874 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:58,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1594859171, now seen corresponding path program 91 times [2021-07-09 18:55:58,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:58,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224097] [2021-07-09 18:55:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:59,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:59,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224097] [2021-07-09 18:55:59,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:59,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182010331] [2021-07-09 18:55:59,200 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:55:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:59,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:55:59,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:55:59,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:55:59,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:55:59,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:55:59,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:55:59,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-07-09 18:55:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:59,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182010331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:59,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:59,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 18:55:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527980084] [2021-07-09 18:55:59,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:55:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:55:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:55:59,648 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:01,633 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-07-09 18:56:01,963 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-07-09 18:56:02,492 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-07-09 18:56:03,420 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-07-09 18:56:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:04,712 INFO L93 Difference]: Finished difference Result 64130 states and 241390 transitions. [2021-07-09 18:56:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:56:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:56:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:04,908 INFO L225 Difference]: With dead ends: 64130 [2021-07-09 18:56:04,908 INFO L226 Difference]: Without dead ends: 64115 [2021-07-09 18:56:04,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 4469.2ms TimeCoverageRelationStatistics Valid=783, Invalid=4767, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:56:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64115 states. [2021-07-09 18:56:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64115 to 50612. [2021-07-09 18:56:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-07-09 18:56:06,380 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-07-09 18:56:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:06,380 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-07-09 18:56:06,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-07-09 18:56:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:56:06,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:06,699 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:06,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-07-09 18:56:06,915 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:06,915 INFO L82 PathProgramCache]: Analyzing trace with hash -344679385, now seen corresponding path program 92 times [2021-07-09 18:56:06,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:06,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959376046] [2021-07-09 18:56:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:56:07,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:07,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959376046] [2021-07-09 18:56:07,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959376046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:07,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044801899] [2021-07-09 18:56:07,237 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:07,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:56:07,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:56:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:07,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:56:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:07,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:56:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:07,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:56:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:56:07,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:56:07,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:56:07,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:56:07,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-07-09 18:56:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:56:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044801899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:07,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:07,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 18:56:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531372644] [2021-07-09 18:56:07,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:56:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:56:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:56:07,500 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:09,469 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-07-09 18:56:09,817 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-07-09 18:56:10,114 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-07-09 18:56:10,260 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-07-09 18:56:11,137 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-07-09 18:56:12,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:12,492 INFO L93 Difference]: Finished difference Result 64415 states and 242251 transitions. [2021-07-09 18:56:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:56:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:56:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:12,690 INFO L225 Difference]: With dead ends: 64415 [2021-07-09 18:56:12,690 INFO L226 Difference]: Without dead ends: 64400 [2021-07-09 18:56:12,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 4189.9ms TimeCoverageRelationStatistics Valid=826, Invalid=4724, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:56:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64400 states. [2021-07-09 18:56:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64400 to 50619. [2021-07-09 18:56:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50619 states, 50618 states have (on average 3.878323916393378) internal successors, (196313), 50618 states have internal predecessors, (196313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50619 states to 50619 states and 196313 transitions. [2021-07-09 18:56:14,434 INFO L78 Accepts]: Start accepts. Automaton has 50619 states and 196313 transitions. Word has length 30 [2021-07-09 18:56:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:14,434 INFO L482 AbstractCegarLoop]: Abstraction has 50619 states and 196313 transitions. [2021-07-09 18:56:14,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50619 states and 196313 transitions. [2021-07-09 18:56:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:56:14,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:14,517 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:56:14,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:14,733 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1320998229, now seen corresponding path program 93 times [2021-07-09 18:56:14,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:14,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949397230] [2021-07-09 18:56:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:56:14,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:14,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949397230] [2021-07-09 18:56:14,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949397230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:14,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019554272] [2021-07-09 18:56:14,989 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:15,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:56:15,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:15,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:56:15,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:15,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:56:15,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-07-09 18:56:15,325 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:56:15,530 INFO L628 ElimStorePlain]: treesize reduction 19, result has 54.8 percent of original size [2021-07-09 18:56:15,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:56:15,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2021-07-09 18:56:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:56:15,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019554272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:15,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:56:15,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-09 18:56:15,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263065022] [2021-07-09 18:56:15,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:56:15,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:56:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:56:15,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:56:15,625 INFO L87 Difference]: Start difference. First operand 50619 states and 196313 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2021-07-09 18:56:17,257 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-09 18:56:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:56:18,982 INFO L93 Difference]: Finished difference Result 88005 states and 327696 transitions. [2021-07-09 18:56:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:56:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 30 [2021-07-09 18:56:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:56:19,256 INFO L225 Difference]: With dead ends: 88005 [2021-07-09 18:56:19,256 INFO L226 Difference]: Without dead ends: 87990 [2021-07-09 18:56:19,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2239.9ms TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:56:19,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87990 states. [2021-07-09 18:56:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87990 to 50624. [2021-07-09 18:56:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50624 states, 50623 states have (on average 3.878217411058215) internal successors, (196327), 50623 states have internal predecessors, (196327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:56:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50624 states to 50624 states and 196327 transitions. [2021-07-09 18:56:21,066 INFO L78 Accepts]: Start accepts. Automaton has 50624 states and 196327 transitions. Word has length 30 [2021-07-09 18:56:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:56:21,066 INFO L482 AbstractCegarLoop]: Abstraction has 50624 states and 196327 transitions. [2021-07-09 18:56:21,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2021-07-09 18:56:21,066 INFO L276 IsEmpty]: Start isEmpty. Operand 50624 states and 196327 transitions. [2021-07-09 18:56:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:56:21,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:56:21,153 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] [2021-07-09 18:56:21,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable787 [2021-07-09 18:56:21,369 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:56:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:56:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 241742567, now seen corresponding path program 207 times [2021-07-09 18:56:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:56:21,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693949104] [2021-07-09 18:56:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:56:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:56:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:56:21,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:56:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693949104] [2021-07-09 18:56:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693949104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:56:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115621301] [2021-07-09 18:56:21,751 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:56:21,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:56:21,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:56:21,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:56:21,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:56:22,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:56:22,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:56:22,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85