/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/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:00:37,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:00:37,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:00:38,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:00:38,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:00:38,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:00:38,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:00:38,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:00:38,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:00:38,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:00:38,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:00:38,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:00:38,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:00:38,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:00:38,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:00:38,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:00:38,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:00:38,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:00:38,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:00:38,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:00:38,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:00:38,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:00:38,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:00:38,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:00:38,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:00:38,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:00:38,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:00:38,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:00:38,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:00:38,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 18:00:38,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:00:38,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:00:38,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:00:38,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:00:38,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:00:38,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:00:38,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:00:38,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:00:38,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:00:38,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:00:38,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:00:38,086 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 18:00:38,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:00:38,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:00:38,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:00:38,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:00:38,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:00:38,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:00:38,129 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:00:38,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:00:38,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:00:38,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:00:38,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:00:38,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:00:38,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:00:38,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:00:38,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:00:38,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:00:38,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:00:38,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:00:38,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:00:38,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:00:38,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:00:38,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:00:38,132 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:00:38,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:00:38,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:00:38,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:00:38,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:00:38,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:00:38,439 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:00:38,441 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:00:38,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-07-09 18:00:38,442 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-07-09 18:00:38,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:00:38,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:00:38,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:00:38,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:00:38,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:00:38,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:00:38,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:00:38,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:00:38,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:00:38,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/1) ... [2021-07-09 18:00:38,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:00:38,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:00:38,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:00:38,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:00:38,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (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 18:00:38,583 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:00:38,583 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:00:38,583 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:00:38,583 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:00:38,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:00:38,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:00:38,584 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:00:38,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:00:38,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:00:38,584 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:00:38,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:00:38,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:00:38,585 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:00:38,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:00:38,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:00:38,586 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 18:00:38,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:00:38,873 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:00:38,875 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:00:38 BoogieIcfgContainer [2021-07-09 18:00:38,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:00:38,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:00:38,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:00:38,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:00:38,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:00:38" (1/2) ... [2021-07-09 18:00:38,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76868515 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:00:38, skipping insertion in model container [2021-07-09 18:00:38,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:00:38" (2/2) ... [2021-07-09 18:00:38,881 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-07-09 18:00:38,886 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:00:38,886 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:00:38,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:00:38,887 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:00:38,924 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 18:00:38,943 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 18:00:38,959 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:00:38,960 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:00:38,960 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:00:38,960 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:00:38,960 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:00:38,960 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:00:38,960 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:00:38,961 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:00:38,969 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-07-09 18:00:39,038 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:00:39,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:39,068 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:39,068 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1581359210, now seen corresponding path program 1 times [2021-07-09 18:00:39,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:39,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565130084] [2021-07-09 18:00:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:39,286 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 18:00:39,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:39,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565130084] [2021-07-09 18:00:39,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565130084] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:39,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:39,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:00:39,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327417661] [2021-07-09 18:00:39,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:00:39,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:00:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:39,313 INFO L87 Difference]: Start difference. First operand has 710 states, 709 states have (on average 3.6473906911142455) internal successors, (2586), 709 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:39,497 INFO L93 Difference]: Finished difference Result 3229 states and 11601 transitions. [2021-07-09 18:00:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:00:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:39,567 INFO L225 Difference]: With dead ends: 3229 [2021-07-09 18:00:39,567 INFO L226 Difference]: Without dead ends: 2179 [2021-07-09 18:00:39,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-07-09 18:00:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 955. [2021-07-09 18:00:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.611111111111111) internal successors, (3445), 954 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3445 transitions. [2021-07-09 18:00:39,706 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3445 transitions. Word has length 23 [2021-07-09 18:00:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:39,707 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3445 transitions. [2021-07-09 18:00:39,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3445 transitions. [2021-07-09 18:00:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:00:39,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:39,711 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:39,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:00:39,711 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1499988984, now seen corresponding path program 2 times [2021-07-09 18:00:39,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:39,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70885806] [2021-07-09 18:00:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:39,791 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 18:00:39,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:39,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70885806] [2021-07-09 18:00:39,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70885806] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:39,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:39,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:39,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888770788] [2021-07-09 18:00:39,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:39,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:39,795 INFO L87 Difference]: Start difference. First operand 955 states and 3445 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:39,829 INFO L93 Difference]: Finished difference Result 1206 states and 4309 transitions. [2021-07-09 18:00:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:00:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:39,835 INFO L225 Difference]: With dead ends: 1206 [2021-07-09 18:00:39,835 INFO L226 Difference]: Without dead ends: 859 [2021-07-09 18:00:39,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-07-09 18:00:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-07-09 18:00:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-07-09 18:00:39,895 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-07-09 18:00:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:39,895 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-07-09 18:00:39,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-07-09 18:00:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:00:39,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:39,899 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:39,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:00:39,900 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-07-09 18:00:39,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:39,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550554256] [2021-07-09 18:00:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:39,970 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 18:00:39,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:39,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550554256] [2021-07-09 18:00:39,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550554256] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:39,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:39,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:00:39,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536115593] [2021-07-09 18:00:39,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:00:39,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:39,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:00:39,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:39,973 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:40,128 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-07-09 18:00:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:40,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:00:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,145 INFO L225 Difference]: With dead ends: 3289 [2021-07-09 18:00:40,146 INFO L226 Difference]: Without dead ends: 2391 [2021-07-09 18:00:40,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-09 18:00:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-07-09 18:00:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-07-09 18:00:40,196 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-07-09 18:00:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:40,196 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-07-09 18:00:40,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-07-09 18:00:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:00:40,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:40,200 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:40,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:00:40,200 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-07-09 18:00:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:40,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902560153] [2021-07-09 18:00:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,264 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 18:00:40,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:40,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902560153] [2021-07-09 18:00:40,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902560153] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:40,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:40,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:40,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333112419] [2021-07-09 18:00:40,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:40,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:40,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:40,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:40,266 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:40,299 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-07-09 18:00:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:40,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:00:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,305 INFO L225 Difference]: With dead ends: 1081 [2021-07-09 18:00:40,305 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 18:00:40,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 18:00:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-07-09 18:00:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-07-09 18:00:40,332 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-07-09 18:00:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:40,332 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-07-09 18:00:40,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-07-09 18:00:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:00:40,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:40,335 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:40,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:00:40,335 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash 270626710, now seen corresponding path program 1 times [2021-07-09 18:00:40,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:40,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055957448] [2021-07-09 18:00:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:40,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:40,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055957448] [2021-07-09 18:00:40,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055957448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:40,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96295079] [2021-07-09 18:00:40,415 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 18:00:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:00:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:40,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96295079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:40,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:40,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:00:40,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467150648] [2021-07-09 18:00:40,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:00:40,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:40,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:00:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:00:40,632 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 18:00:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:40,712 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-07-09 18:00:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:00:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 25 [2021-07-09 18:00:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,725 INFO L225 Difference]: With dead ends: 1914 [2021-07-09 18:00:40,725 INFO L226 Difference]: Without dead ends: 1914 [2021-07-09 18:00:40,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-07-09 18:00:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-07-09 18:00:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-07-09 18:00:40,780 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-07-09 18:00:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:40,781 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-07-09 18:00:40,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 18:00:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-07-09 18:00:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:00:40,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:40,788 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:41,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:41,005 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash -524449864, now seen corresponding path program 1 times [2021-07-09 18:00:41,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:41,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722398233] [2021-07-09 18:00:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:41,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:41,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722398233] [2021-07-09 18:00:41,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722398233] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:41,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:41,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:41,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288507821] [2021-07-09 18:00:41,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:41,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:41,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:41,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:41,056 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:41,105 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-07-09 18:00:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:41,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:00:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:41,116 INFO L225 Difference]: With dead ends: 1486 [2021-07-09 18:00:41,116 INFO L226 Difference]: Without dead ends: 1456 [2021-07-09 18:00:41,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-07-09 18:00:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-07-09 18:00:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-07-09 18:00:41,167 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-07-09 18:00:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:41,168 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-07-09 18:00:41,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-07-09 18:00:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:00:41,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:41,173 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:41,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:00:41,174 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:41,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1724816056, now seen corresponding path program 1 times [2021-07-09 18:00:41,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:41,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766175555] [2021-07-09 18:00:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:41,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:41,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766175555] [2021-07-09 18:00:41,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766175555] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:41,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:41,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:41,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137536828] [2021-07-09 18:00:41,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:41,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:41,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:41,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:41,232 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:41,327 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2021-07-09 18:00:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:00:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:41,339 INFO L225 Difference]: With dead ends: 1766 [2021-07-09 18:00:41,340 INFO L226 Difference]: Without dead ends: 1644 [2021-07-09 18:00:41,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-09 18:00:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2021-07-09 18:00:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2021-07-09 18:00:41,398 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2021-07-09 18:00:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:41,399 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2021-07-09 18:00:41,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2021-07-09 18:00:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:00:41,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:41,403 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:41,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:00:41,403 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -5183016, now seen corresponding path program 2 times [2021-07-09 18:00:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:41,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881145909] [2021-07-09 18:00:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:41,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:41,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881145909] [2021-07-09 18:00:41,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881145909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:41,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484804664] [2021-07-09 18:00:41,461 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 18:00:41,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:41,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:00:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:41,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484804664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:41,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:41,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-07-09 18:00:41,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954667908] [2021-07-09 18:00:41,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:00:41,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:00:41,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:41,591 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 18:00:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:42,517 INFO L93 Difference]: Finished difference Result 6173 states and 21367 transitions. [2021-07-09 18:00:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:00:42,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 25 [2021-07-09 18:00:42,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:42,553 INFO L225 Difference]: With dead ends: 6173 [2021-07-09 18:00:42,553 INFO L226 Difference]: Without dead ends: 3187 [2021-07-09 18:00:42,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 533.6ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:00:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-07-09 18:00:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1397. [2021-07-09 18:00:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.4978510028653296) internal successors, (4883), 1396 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4883 transitions. [2021-07-09 18:00:42,620 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4883 transitions. Word has length 25 [2021-07-09 18:00:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:42,621 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4883 transitions. [2021-07-09 18:00:42,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 18:00:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4883 transitions. [2021-07-09 18:00:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:00:42,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:42,625 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:42,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:42,845 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash 566728726, now seen corresponding path program 2 times [2021-07-09 18:00:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:42,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168128375] [2021-07-09 18:00:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:42,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:42,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168128375] [2021-07-09 18:00:42,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168128375] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:00:42,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:00:42,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:00:42,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862191211] [2021-07-09 18:00:42,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:00:42,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:42,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:00:42,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:00:42,868 INFO L87 Difference]: Start difference. First operand 1397 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:42,916 INFO L93 Difference]: Finished difference Result 1523 states and 5204 transitions. [2021-07-09 18:00:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:00:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:00:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:42,922 INFO L225 Difference]: With dead ends: 1523 [2021-07-09 18:00:42,922 INFO L226 Difference]: Without dead ends: 1424 [2021-07-09 18:00:42,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:00:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-07-09 18:00:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1302. [2021-07-09 18:00:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.504227517294389) internal successors, (4559), 1301 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4559 transitions. [2021-07-09 18:00:42,962 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4559 transitions. Word has length 25 [2021-07-09 18:00:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:42,962 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4559 transitions. [2021-07-09 18:00:42,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4559 transitions. [2021-07-09 18:00:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:00:42,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:42,966 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:42,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 18:00:42,966 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1313441110, now seen corresponding path program 3 times [2021-07-09 18:00:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:42,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529774142] [2021-07-09 18:00:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:43,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:43,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529774142] [2021-07-09 18:00:43,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529774142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275719214] [2021-07-09 18:00:43,016 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 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 18:00:43,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:00:43,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:43,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:00:43,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:43,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275719214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:43,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:00:43,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564350738] [2021-07-09 18:00:43,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:00:43,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:00:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:00:43,112 INFO L87 Difference]: Start difference. First operand 1302 states and 4559 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 18:00:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:43,175 INFO L93 Difference]: Finished difference Result 1384 states and 4841 transitions. [2021-07-09 18:00:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:00:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 25 [2021-07-09 18:00:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:43,182 INFO L225 Difference]: With dead ends: 1384 [2021-07-09 18:00:43,183 INFO L226 Difference]: Without dead ends: 1282 [2021-07-09 18:00:43,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-07-09 18:00:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-07-09 18:00:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5167785234899327) internal successors, (3668), 1043 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3668 transitions. [2021-07-09 18:00:43,212 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3668 transitions. Word has length 25 [2021-07-09 18:00:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:43,212 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3668 transitions. [2021-07-09 18:00:43,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 18:00:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3668 transitions. [2021-07-09 18:00:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:43,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:43,216 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:43,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:00:43,417 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1224692314, now seen corresponding path program 1 times [2021-07-09 18:00:43,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:43,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326468612] [2021-07-09 18:00:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:43,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326468612] [2021-07-09 18:00:43,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326468612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854573290] [2021-07-09 18:00:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:00:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:00:43,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:43,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:43,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:43,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-07-09 18:00:43,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:00:43,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:43,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:43,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:43,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-09 18:00:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:43,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854573290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:43,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:00:43,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785507076] [2021-07-09 18:00:43,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:00:43,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:00:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:00:43,807 INFO L87 Difference]: Start difference. First operand 1044 states and 3668 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:44,068 INFO L93 Difference]: Finished difference Result 2466 states and 8751 transitions. [2021-07-09 18:00:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:00:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:00:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:44,076 INFO L225 Difference]: With dead ends: 2466 [2021-07-09 18:00:44,076 INFO L226 Difference]: Without dead ends: 1631 [2021-07-09 18:00:44,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:00:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-07-09 18:00:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1283. [2021-07-09 18:00:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.4672386895475817) internal successors, (4445), 1282 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4445 transitions. [2021-07-09 18:00:44,114 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4445 transitions. Word has length 29 [2021-07-09 18:00:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:44,115 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4445 transitions. [2021-07-09 18:00:44,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4445 transitions. [2021-07-09 18:00:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:00:44,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:44,119 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:44,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:44,333 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -22453128, now seen corresponding path program 2 times [2021-07-09 18:00:44,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:44,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864721390] [2021-07-09 18:00:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:44,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:44,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864721390] [2021-07-09 18:00:44,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864721390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:44,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973893695] [2021-07-09 18:00:44,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:44,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:00:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:44,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-07-09 18:00:44,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:44,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:44,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:44,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-07-09 18:00:44,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 18:00:44,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:44,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:44,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:44,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:00:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:44,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973893695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:44,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:44,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:00:44,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157485312] [2021-07-09 18:00:44,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:00:44,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:44,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:00:44,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:00:44,625 INFO L87 Difference]: Start difference. First operand 1283 states and 4445 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 18:00:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:45,000 INFO L93 Difference]: Finished difference Result 2852 states and 10126 transitions. [2021-07-09 18:00:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:00:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 29 [2021-07-09 18:00:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:45,007 INFO L225 Difference]: With dead ends: 2852 [2021-07-09 18:00:45,007 INFO L226 Difference]: Without dead ends: 1150 [2021-07-09 18:00:45,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-07-09 18:00:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 753. [2021-07-09 18:00:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.466755319148936) internal successors, (2607), 752 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2607 transitions. [2021-07-09 18:00:45,029 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2607 transitions. Word has length 29 [2021-07-09 18:00:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:45,029 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2607 transitions. [2021-07-09 18:00:45,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 18:00:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2607 transitions. [2021-07-09 18:00:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:00:45,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:45,031 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:45,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 18:00:45,255 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash -75130500, now seen corresponding path program 3 times [2021-07-09 18:00:45,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:45,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405784809] [2021-07-09 18:00:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:45,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:45,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405784809] [2021-07-09 18:00:45,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405784809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:45,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874136080] [2021-07-09 18:00:45,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:45,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:00:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:00:45,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874136080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:45,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:45,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:00:45,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661677797] [2021-07-09 18:00:45,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:00:45,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:45,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:00:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:45,424 INFO L87 Difference]: Start difference. First operand 753 states and 2607 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 18:00:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:45,871 INFO L93 Difference]: Finished difference Result 2449 states and 8696 transitions. [2021-07-09 18:00:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:00:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 31 [2021-07-09 18:00:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:45,882 INFO L225 Difference]: With dead ends: 2449 [2021-07-09 18:00:45,882 INFO L226 Difference]: Without dead ends: 2435 [2021-07-09 18:00:45,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:00:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-07-09 18:00:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1458. [2021-07-09 18:00:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.723404255319149) internal successors, (5425), 1457 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5425 transitions. [2021-07-09 18:00:45,928 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5425 transitions. Word has length 31 [2021-07-09 18:00:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:45,928 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5425 transitions. [2021-07-09 18:00:45,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 18:00:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5425 transitions. [2021-07-09 18:00:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:45,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:45,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:46,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:46,134 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2064884962, now seen corresponding path program 4 times [2021-07-09 18:00:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877256536] [2021-07-09 18:00:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:46,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:46,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877256536] [2021-07-09 18:00:46,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877256536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:46,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993736883] [2021-07-09 18:00:46,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:46,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:46,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:00:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:00:46,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993736883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:46,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:46,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:00:46,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931042640] [2021-07-09 18:00:46,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:00:46,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:00:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:00:46,276 INFO L87 Difference]: Start difference. First operand 1458 states and 5425 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 18:00:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:46,353 INFO L93 Difference]: Finished difference Result 3104 states and 11373 transitions. [2021-07-09 18:00:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:00:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 33 [2021-07-09 18:00:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:46,365 INFO L225 Difference]: With dead ends: 3104 [2021-07-09 18:00:46,366 INFO L226 Difference]: Without dead ends: 3100 [2021-07-09 18:00:46,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:00:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-07-09 18:00:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1644. [2021-07-09 18:00:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.837492391965916) internal successors, (6305), 1643 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 6305 transitions. [2021-07-09 18:00:46,422 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 6305 transitions. Word has length 33 [2021-07-09 18:00:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:46,422 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 6305 transitions. [2021-07-09 18:00:46,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 18:00:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 6305 transitions. [2021-07-09 18:00:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:46,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:46,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:46,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:00:46,653 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash 397003162, now seen corresponding path program 5 times [2021-07-09 18:00:46,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:46,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954099306] [2021-07-09 18:00:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:46,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:46,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954099306] [2021-07-09 18:00:46,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954099306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:46,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405070151] [2021-07-09 18:00:46,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:46,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:00:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:00:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:46,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405070151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:46,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:46,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:00:46,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693004703] [2021-07-09 18:00:46,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:00:46,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:46,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:00:46,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:00:46,807 INFO L87 Difference]: Start difference. First operand 1644 states and 6305 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 18:00:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:46,914 INFO L93 Difference]: Finished difference Result 3039 states and 11040 transitions. [2021-07-09 18:00:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 33 [2021-07-09 18:00:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:46,925 INFO L225 Difference]: With dead ends: 3039 [2021-07-09 18:00:46,926 INFO L226 Difference]: Without dead ends: 3039 [2021-07-09 18:00:46,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-07-09 18:00:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1619. [2021-07-09 18:00:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.857849196538937) internal successors, (6242), 1618 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 6242 transitions. [2021-07-09 18:00:46,977 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 6242 transitions. Word has length 33 [2021-07-09 18:00:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:46,977 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 6242 transitions. [2021-07-09 18:00:46,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 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 18:00:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 6242 transitions. [2021-07-09 18:00:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:46,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:46,982 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:47,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:00:47,197 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1552526810, now seen corresponding path program 6 times [2021-07-09 18:00:47,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:47,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650599460] [2021-07-09 18:00:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:47,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:47,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650599460] [2021-07-09 18:00:47,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650599460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:47,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852101817] [2021-07-09 18:00:47,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:47,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:00:47,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:00:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:47,379 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 18:00:47,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852101817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:47,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:47,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:00:47,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922596823] [2021-07-09 18:00:47,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:00:47,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:00:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:47,381 INFO L87 Difference]: Start difference. First operand 1619 states and 6242 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 18:00:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:48,094 INFO L93 Difference]: Finished difference Result 7858 states and 29355 transitions. [2021-07-09 18:00:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:00:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 33 [2021-07-09 18:00:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:48,125 INFO L225 Difference]: With dead ends: 7858 [2021-07-09 18:00:48,125 INFO L226 Difference]: Without dead ends: 7378 [2021-07-09 18:00:48,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 375.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:00:48,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-07-09 18:00:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3747. [2021-07-09 18:00:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 4.203150026695141) internal successors, (15745), 3746 states have internal predecessors, (15745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 15745 transitions. [2021-07-09 18:00:48,272 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 15745 transitions. Word has length 33 [2021-07-09 18:00:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:48,272 INFO L482 AbstractCegarLoop]: Abstraction has 3747 states and 15745 transitions. [2021-07-09 18:00:48,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 18:00:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 15745 transitions. [2021-07-09 18:00:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:48,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:48,283 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:48,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:00:48,492 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:48,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:48,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1594897896, now seen corresponding path program 7 times [2021-07-09 18:00:48,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:48,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227213793] [2021-07-09 18:00:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:48,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:48,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227213793] [2021-07-09 18:00:48,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227213793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:48,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722602365] [2021-07-09 18:00:48,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:00:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:00:48,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722602365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:48,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:48,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:00:48,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534607157] [2021-07-09 18:00:48,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:00:48,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:00:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:00:48,644 INFO L87 Difference]: Start difference. First operand 3747 states and 15745 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:48,722 INFO L93 Difference]: Finished difference Result 5515 states and 21821 transitions. [2021-07-09 18:00:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:48,742 INFO L225 Difference]: With dead ends: 5515 [2021-07-09 18:00:48,743 INFO L226 Difference]: Without dead ends: 5515 [2021-07-09 18:00:48,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2021-07-09 18:00:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3848. [2021-07-09 18:00:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.193137509747856) internal successors, (16131), 3847 states have internal predecessors, (16131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16131 transitions. [2021-07-09 18:00:48,916 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16131 transitions. Word has length 33 [2021-07-09 18:00:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:48,916 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16131 transitions. [2021-07-09 18:00:48,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16131 transitions. [2021-07-09 18:00:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:48,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:48,928 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:49,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:00:49,145 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash 675776348, now seen corresponding path program 8 times [2021-07-09 18:00:49,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:49,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625834969] [2021-07-09 18:00:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:49,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:49,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625834969] [2021-07-09 18:00:49,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625834969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:49,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725544786] [2021-07-09 18:00:49,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:49,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:49,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:00:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725544786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:49,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:00:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451772777] [2021-07-09 18:00:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:00:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:49,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:00:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:49,320 INFO L87 Difference]: Start difference. First operand 3848 states and 16131 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 18:00:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:49,445 INFO L93 Difference]: Finished difference Result 5599 states and 22264 transitions. [2021-07-09 18:00:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:49,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 33 [2021-07-09 18:00:49,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:49,464 INFO L225 Difference]: With dead ends: 5599 [2021-07-09 18:00:49,464 INFO L226 Difference]: Without dead ends: 5599 [2021-07-09 18:00:49,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:00:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-07-09 18:00:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 4158. [2021-07-09 18:00:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.1554005292278084) internal successors, (17274), 4157 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17274 transitions. [2021-07-09 18:00:49,596 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17274 transitions. Word has length 33 [2021-07-09 18:00:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:49,597 INFO L482 AbstractCegarLoop]: Abstraction has 4158 states and 17274 transitions. [2021-07-09 18:00:49,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 18:00:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17274 transitions. [2021-07-09 18:00:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:49,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:49,609 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:49,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:00:49,825 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -51003200, now seen corresponding path program 9 times [2021-07-09 18:00:49,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:49,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819265149] [2021-07-09 18:00:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:00:50,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:50,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819265149] [2021-07-09 18:00:50,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819265149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:50,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180072558] [2021-07-09 18:00:50,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:50,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:50,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:00:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:50,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:50,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:00:50,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:00:50,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:50,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:00:50,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-07-09 18:00:50,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 25 treesize of output 21 [2021-07-09 18:00:50,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:50,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-07-09 18:00:50,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:50,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:00:50,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:43 [2021-07-09 18:00:50,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:00:50,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,634 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.0 percent of original size [2021-07-09 18:00:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:00:50,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,641 INFO L628 ElimStorePlain]: treesize reduction 6, result has 45.5 percent of original size [2021-07-09 18:00:50,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:50,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:5 [2021-07-09 18:00:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:50,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180072558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:50,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:50,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2021-07-09 18:00:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407626886] [2021-07-09 18:00:50,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:00:50,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:50,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:00:50,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:50,670 INFO L87 Difference]: Start difference. First operand 4158 states and 17274 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:51,648 INFO L93 Difference]: Finished difference Result 9317 states and 38403 transitions. [2021-07-09 18:00:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:00:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:00:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:51,659 INFO L225 Difference]: With dead ends: 9317 [2021-07-09 18:00:51,660 INFO L226 Difference]: Without dead ends: 4302 [2021-07-09 18:00:51,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:00:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-07-09 18:00:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 4250. [2021-07-09 18:00:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 4.120498940927277) internal successors, (17508), 4249 states have internal predecessors, (17508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 17508 transitions. [2021-07-09 18:00:51,759 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 17508 transitions. Word has length 35 [2021-07-09 18:00:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:51,759 INFO L482 AbstractCegarLoop]: Abstraction has 4250 states and 17508 transitions. [2021-07-09 18:00:51,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 17508 transitions. [2021-07-09 18:00:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:00:51,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:51,771 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:51,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:51,985 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash -436856958, now seen corresponding path program 10 times [2021-07-09 18:00:51,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:51,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032204725] [2021-07-09 18:00:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:00:52,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:52,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032204725] [2021-07-09 18:00:52,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032204725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:52,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732210048] [2021-07-09 18:00:52,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:52,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:52,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:52,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:00:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:52,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:52,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:00:52,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:52,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:00:52,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:52,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:52,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:00:52,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:39 [2021-07-09 18:00:52,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:00:52,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:00:52,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:52,536 INFO L628 ElimStorePlain]: treesize reduction 23, result has 11.5 percent of original size [2021-07-09 18:00:52,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2021-07-09 18:00:52,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:52,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:3 [2021-07-09 18:00:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:52,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732210048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:52,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:52,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-07-09 18:00:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237353741] [2021-07-09 18:00:52,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:00:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:00:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:00:52,554 INFO L87 Difference]: Start difference. First operand 4250 states and 17508 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 18:00:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:53,224 INFO L93 Difference]: Finished difference Result 9382 states and 37522 transitions. [2021-07-09 18:00:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:00:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 35 [2021-07-09 18:00:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:53,239 INFO L225 Difference]: With dead ends: 9382 [2021-07-09 18:00:53,239 INFO L226 Difference]: Without dead ends: 4508 [2021-07-09 18:00:53,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:00:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-07-09 18:00:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4326. [2021-07-09 18:00:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 4.0920231213872835) internal successors, (17698), 4325 states have internal predecessors, (17698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 17698 transitions. [2021-07-09 18:00:53,405 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 17698 transitions. Word has length 35 [2021-07-09 18:00:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:53,406 INFO L482 AbstractCegarLoop]: Abstraction has 4326 states and 17698 transitions. [2021-07-09 18:00:53,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 18:00:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 17698 transitions. [2021-07-09 18:00:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:00:53,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:53,419 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:53,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:00:53,643 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:53,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash -713440738, now seen corresponding path program 11 times [2021-07-09 18:00:53,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:53,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479314174] [2021-07-09 18:00:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:00:53,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:53,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479314174] [2021-07-09 18:00:53,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479314174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:53,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569758866] [2021-07-09 18:00:53,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:00:53,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:00:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:00:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:00:53,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569758866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:53,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:53,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:00:53,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634746033] [2021-07-09 18:00:53,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:00:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:00:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:53,819 INFO L87 Difference]: Start difference. First operand 4326 states and 17698 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 18:00:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:53,917 INFO L93 Difference]: Finished difference Result 6092 states and 23684 transitions. [2021-07-09 18:00:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:00:53,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 37 [2021-07-09 18:00:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:53,933 INFO L225 Difference]: With dead ends: 6092 [2021-07-09 18:00:53,933 INFO L226 Difference]: Without dead ends: 6080 [2021-07-09 18:00:53,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:53,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2021-07-09 18:00:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 4576. [2021-07-09 18:00:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.078032786885246) internal successors, (18657), 4575 states have internal predecessors, (18657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18657 transitions. [2021-07-09 18:00:54,074 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18657 transitions. Word has length 37 [2021-07-09 18:00:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:54,074 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 18657 transitions. [2021-07-09 18:00:54,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 18:00:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18657 transitions. [2021-07-09 18:00:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:00:54,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:54,087 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:54,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:54,301 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:54,301 INFO L82 PathProgramCache]: Analyzing trace with hash -967541542, now seen corresponding path program 12 times [2021-07-09 18:00:54,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:54,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516475555] [2021-07-09 18:00:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:54,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:54,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516475555] [2021-07-09 18:00:54,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516475555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:54,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324698627] [2021-07-09 18:00:54,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:54,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:00:54,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:00:54,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:00:54,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324698627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:54,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:54,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:00:54,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054284651] [2021-07-09 18:00:54,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:00:54,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:00:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:54,426 INFO L87 Difference]: Start difference. First operand 4576 states and 18657 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 18:00:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:54,565 INFO L93 Difference]: Finished difference Result 9156 states and 35918 transitions. [2021-07-09 18:00:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:00:54,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 37 [2021-07-09 18:00:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:54,590 INFO L225 Difference]: With dead ends: 9156 [2021-07-09 18:00:54,590 INFO L226 Difference]: Without dead ends: 9136 [2021-07-09 18:00:54,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:00:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-07-09 18:00:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 5812. [2021-07-09 18:00:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 4.22715539494063) internal successors, (24564), 5811 states have internal predecessors, (24564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 24564 transitions. [2021-07-09 18:00:54,765 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 24564 transitions. Word has length 37 [2021-07-09 18:00:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:54,765 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 24564 transitions. [2021-07-09 18:00:54,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 18:00:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 24564 transitions. [2021-07-09 18:00:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:00:54,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:54,778 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:54,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:00:54,979 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1494346582, now seen corresponding path program 13 times [2021-07-09 18:00:54,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:54,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550348236] [2021-07-09 18:00:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:00:55,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550348236] [2021-07-09 18:00:55,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550348236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011689436] [2021-07-09 18:00:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:55,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:00:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:00:55,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011689436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:55,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:00:55,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691304610] [2021-07-09 18:00:55,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:00:55,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:55,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:00:55,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:00:55,125 INFO L87 Difference]: Start difference. First operand 5812 states and 24564 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 18:00:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:55,277 INFO L93 Difference]: Finished difference Result 9442 states and 37337 transitions. [2021-07-09 18:00:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:00:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 37 [2021-07-09 18:00:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:55,309 INFO L225 Difference]: With dead ends: 9442 [2021-07-09 18:00:55,309 INFO L226 Difference]: Without dead ends: 9442 [2021-07-09 18:00:55,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:00:55,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-07-09 18:00:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 5125. [2021-07-09 18:00:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 4.132708821233411) internal successors, (21176), 5124 states have internal predecessors, (21176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 21176 transitions. [2021-07-09 18:00:55,449 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 21176 transitions. Word has length 37 [2021-07-09 18:00:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:55,450 INFO L482 AbstractCegarLoop]: Abstraction has 5125 states and 21176 transitions. [2021-07-09 18:00:55,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 18:00:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 21176 transitions. [2021-07-09 18:00:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:00:55,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:55,461 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:55,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:55,662 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash -529946470, now seen corresponding path program 14 times [2021-07-09 18:00:55,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:55,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131858880] [2021-07-09 18:00:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:55,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131858880] [2021-07-09 18:00:55,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131858880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829585269] [2021-07-09 18:00:55,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:55,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:55,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:00:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:55,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829585269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:55,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:55,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:00:55,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084648776] [2021-07-09 18:00:55,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:00:55,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:55,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:00:55,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:00:55,858 INFO L87 Difference]: Start difference. First operand 5125 states and 21176 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 18:00:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:56,023 INFO L93 Difference]: Finished difference Result 8511 states and 32921 transitions. [2021-07-09 18:00:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:00:56,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 37 [2021-07-09 18:00:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:56,046 INFO L225 Difference]: With dead ends: 8511 [2021-07-09 18:00:56,046 INFO L226 Difference]: Without dead ends: 8511 [2021-07-09 18:00:56,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:00:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-07-09 18:00:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4053. [2021-07-09 18:00:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 4.028874629812439) internal successors, (16325), 4052 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 16325 transitions. [2021-07-09 18:00:56,173 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 16325 transitions. Word has length 37 [2021-07-09 18:00:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:56,173 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 16325 transitions. [2021-07-09 18:00:56,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 18:00:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 16325 transitions. [2021-07-09 18:00:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:00:56,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:56,182 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:56,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:00:56,382 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:56,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1329963806, now seen corresponding path program 15 times [2021-07-09 18:00:56,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:56,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971892343] [2021-07-09 18:00:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:56,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971892343] [2021-07-09 18:00:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971892343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482779771] [2021-07-09 18:00:56,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:56,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:56,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:56,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:00:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:00:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482779771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:56,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 18:00:56,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35084720] [2021-07-09 18:00:56,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:00:56,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:56,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:00:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:00:56,608 INFO L87 Difference]: Start difference. First operand 4053 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:57,722 INFO L93 Difference]: Finished difference Result 11628 states and 44736 transitions. [2021-07-09 18:00:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:00:57,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:00:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:57,752 INFO L225 Difference]: With dead ends: 11628 [2021-07-09 18:00:57,752 INFO L226 Difference]: Without dead ends: 11024 [2021-07-09 18:00:57,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=1036, Invalid=3520, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:00:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2021-07-09 18:00:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 5085. [2021-07-09 18:00:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.030881195908734) internal successors, (20493), 5084 states have internal predecessors, (20493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 20493 transitions. [2021-07-09 18:00:57,924 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 20493 transitions. Word has length 37 [2021-07-09 18:00:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:57,924 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 20493 transitions. [2021-07-09 18:00:57,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 20493 transitions. [2021-07-09 18:00:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:00:57,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:57,937 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:58,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:00:58,138 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:58,139 INFO L82 PathProgramCache]: Analyzing trace with hash -325004104, now seen corresponding path program 16 times [2021-07-09 18:00:58,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:58,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783786593] [2021-07-09 18:00:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:00:58,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783786593] [2021-07-09 18:00:58,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783786593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135849971] [2021-07-09 18:00:58,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:58,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:00:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:00:58,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135849971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:58,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:58,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 18:00:58,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282536083] [2021-07-09 18:00:58,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:00:58,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:58,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:00:58,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:00:58,375 INFO L87 Difference]: Start difference. First operand 5085 states and 20493 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 18:00:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:58,588 INFO L93 Difference]: Finished difference Result 12069 states and 47387 transitions. [2021-07-09 18:00:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:00:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 39 [2021-07-09 18:00:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:58,641 INFO L225 Difference]: With dead ends: 12069 [2021-07-09 18:00:58,641 INFO L226 Difference]: Without dead ends: 12069 [2021-07-09 18:00:58,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:00:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2021-07-09 18:00:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 8160. [2021-07-09 18:00:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 4.160804020100502) internal successors, (33948), 8159 states have internal predecessors, (33948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 33948 transitions. [2021-07-09 18:00:58,906 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 33948 transitions. Word has length 39 [2021-07-09 18:00:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:58,906 INFO L482 AbstractCegarLoop]: Abstraction has 8160 states and 33948 transitions. [2021-07-09 18:00:58,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 18:00:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 33948 transitions. [2021-07-09 18:00:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:00:58,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:58,923 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:59,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:00:59,124 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash -498998490, now seen corresponding path program 17 times [2021-07-09 18:00:59,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:59,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253010088] [2021-07-09 18:00:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-09 18:00:59,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253010088] [2021-07-09 18:00:59,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253010088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:59,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771761060] [2021-07-09 18:00:59,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:59,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:00:59,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:00:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:00:59,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771761060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:59,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:59,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 18:00:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772493511] [2021-07-09 18:00:59,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:00:59,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:00:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:00:59,322 INFO L87 Difference]: Start difference. First operand 8160 states and 33948 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:00,818 INFO L93 Difference]: Finished difference Result 26614 states and 103468 transitions. [2021-07-09 18:01:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:01:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:01:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:00,899 INFO L225 Difference]: With dead ends: 26614 [2021-07-09 18:01:00,899 INFO L226 Difference]: Without dead ends: 25436 [2021-07-09 18:01:00,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 888.1ms TimeCoverageRelationStatistics Valid=1482, Invalid=5658, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:01:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25436 states. [2021-07-09 18:01:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25436 to 15198. [2021-07-09 18:01:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15198 states, 15197 states have (on average 4.284727248799105) internal successors, (65115), 15197 states have internal predecessors, (65115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15198 states to 15198 states and 65115 transitions. [2021-07-09 18:01:01,435 INFO L78 Accepts]: Start accepts. Automaton has 15198 states and 65115 transitions. Word has length 41 [2021-07-09 18:01:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:01,435 INFO L482 AbstractCegarLoop]: Abstraction has 15198 states and 65115 transitions. [2021-07-09 18:01:01,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 15198 states and 65115 transitions. [2021-07-09 18:01:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:01:01,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:01,471 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:01,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:01:01,671 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:01,672 INFO L82 PathProgramCache]: Analyzing trace with hash -710353052, now seen corresponding path program 18 times [2021-07-09 18:01:01,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:01,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656198874] [2021-07-09 18:01:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:01:01,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:01,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656198874] [2021-07-09 18:01:01,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656198874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:01,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129162129] [2021-07-09 18:01:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:01,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:01:01,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-09 18:01:01,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129162129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:01,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:01,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-09 18:01:01,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627300097] [2021-07-09 18:01:01,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:01:01,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:01:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:01,846 INFO L87 Difference]: Start difference. First operand 15198 states and 65115 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:03,178 INFO L93 Difference]: Finished difference Result 62455 states and 251410 transitions. [2021-07-09 18:01:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:01:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:01:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:03,712 INFO L225 Difference]: With dead ends: 62455 [2021-07-09 18:01:03,713 INFO L226 Difference]: Without dead ends: 62455 [2021-07-09 18:01:03,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:01:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62455 states. [2021-07-09 18:01:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62455 to 31961. [2021-07-09 18:01:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31961 states, 31960 states have (on average 4.464518147684606) internal successors, (142686), 31960 states have internal predecessors, (142686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31961 states to 31961 states and 142686 transitions. [2021-07-09 18:01:05,732 INFO L78 Accepts]: Start accepts. Automaton has 31961 states and 142686 transitions. Word has length 41 [2021-07-09 18:01:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:05,733 INFO L482 AbstractCegarLoop]: Abstraction has 31961 states and 142686 transitions. [2021-07-09 18:01:05,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 31961 states and 142686 transitions. [2021-07-09 18:01:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:01:05,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:05,953 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 18:01:06,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:06,169 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1417828254, now seen corresponding path program 19 times [2021-07-09 18:01:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:06,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645986086] [2021-07-09 18:01:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:01:06,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:06,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645986086] [2021-07-09 18:01:06,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645986086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:06,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570154622] [2021-07-09 18:01:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:01:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:06,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:01:06,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 13 [2021-07-09 18:01:06,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:06,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:19 [2021-07-09 18:01:06,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:01:06,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:06,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-09 18:01:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:06,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 18 treesize of output 18 [2021-07-09 18:01:06,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:06,679 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 18:01:06,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-07-09 18:01:06,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:06,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-07-09 18:01:06,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,832 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:01:06,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 12 [2021-07-09 18:01:06,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:06,835 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 18:01:06,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:5 [2021-07-09 18:01:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:06,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570154622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:06,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:06,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:01:06,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322680077] [2021-07-09 18:01:06,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:06,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:06,853 INFO L87 Difference]: Start difference. First operand 31961 states and 142686 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:08,821 INFO L93 Difference]: Finished difference Result 59369 states and 262032 transitions. [2021-07-09 18:01:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:01:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:01:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:08,981 INFO L225 Difference]: With dead ends: 59369 [2021-07-09 18:01:08,981 INFO L226 Difference]: Without dead ends: 32918 [2021-07-09 18:01:08,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 842.3ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:01:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32918 states. [2021-07-09 18:01:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32918 to 31837. [2021-07-09 18:01:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31837 states, 31836 states have (on average 4.452538007287347) internal successors, (141751), 31836 states have internal predecessors, (141751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31837 states to 31837 states and 141751 transitions. [2021-07-09 18:01:10,131 INFO L78 Accepts]: Start accepts. Automaton has 31837 states and 141751 transitions. Word has length 41 [2021-07-09 18:01:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:10,131 INFO L482 AbstractCegarLoop]: Abstraction has 31837 states and 141751 transitions. [2021-07-09 18:01:10,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 31837 states and 141751 transitions. [2021-07-09 18:01:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:01:10,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:10,252 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 18:01:10,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:10,453 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1435432606, now seen corresponding path program 20 times [2021-07-09 18:01:10,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:10,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578379004] [2021-07-09 18:01:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:01:10,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:10,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578379004] [2021-07-09 18:01:10,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578379004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:10,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617840308] [2021-07-09 18:01:10,618 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 18:01:10,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:10,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:01:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:01:10,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:10,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:10,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:10,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-07-09 18:01:10,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:01:10,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:10,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:01:10,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:10,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:10,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:01:10,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-07-09 18:01:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:10,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-07-09 18:01:10,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-07-09 18:01:10,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:10,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:10,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:01:10,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-07-09 18:01:11,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:11,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 33 [2021-07-09 18:01:11,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:11,373 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-07-09 18:01:11,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 18:01:11,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:11,432 INFO L628 ElimStorePlain]: treesize reduction 5, result has 93.5 percent of original size [2021-07-09 18:01:11,439 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:01:11,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:01:11,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:11,446 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:01:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 15 [2021-07-09 18:01:11,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:11,461 INFO L628 ElimStorePlain]: treesize reduction 20, result has 20.0 percent of original size [2021-07-09 18:01:11,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:11,462 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-07-09 18:01:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:11,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617840308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:11,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:11,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-09 18:01:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409066959] [2021-07-09 18:01:11,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:01:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:01:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:11,487 INFO L87 Difference]: Start difference. First operand 31837 states and 141751 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:12,774 INFO L93 Difference]: Finished difference Result 71320 states and 312582 transitions. [2021-07-09 18:01:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:01:12,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:01:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:13,168 INFO L225 Difference]: With dead ends: 71320 [2021-07-09 18:01:13,169 INFO L226 Difference]: Without dead ends: 40777 [2021-07-09 18:01:13,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:01:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40777 states. [2021-07-09 18:01:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40777 to 31018. [2021-07-09 18:01:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31018 states, 31017 states have (on average 4.447851178386046) internal successors, (137959), 31017 states have internal predecessors, (137959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31018 states to 31018 states and 137959 transitions. [2021-07-09 18:01:14,325 INFO L78 Accepts]: Start accepts. Automaton has 31018 states and 137959 transitions. Word has length 41 [2021-07-09 18:01:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:14,325 INFO L482 AbstractCegarLoop]: Abstraction has 31018 states and 137959 transitions. [2021-07-09 18:01:14,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31018 states and 137959 transitions. [2021-07-09 18:01:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:01:14,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:14,409 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 18:01:14,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:14,613 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1509269082, now seen corresponding path program 21 times [2021-07-09 18:01:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:14,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677937307] [2021-07-09 18:01:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:01:14,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677937307] [2021-07-09 18:01:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677937307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735341668] [2021-07-09 18:01:14,735 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 18:01:14,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:01:14,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:01:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:14,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-09 18:01:14,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:14,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:14,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:14,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-07-09 18:01:14,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:14,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 18 treesize of output 18 [2021-07-09 18:01:14,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:14,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:14,893 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 18:01:14,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:14 [2021-07-09 18:01:14,942 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-07-09 18:01:14,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-07-09 18:01:14,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:14,976 INFO L628 ElimStorePlain]: treesize reduction 15, result has 67.4 percent of original size [2021-07-09 18:01:14,983 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 18:01:14,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2021-07-09 18:01:15,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:15,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:01:15,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:15,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:01:15,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:15,235 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:01:15,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-07-09 18:01:15,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:15,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:01:15,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:01:15,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:15,272 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-07-09 18:01:15,273 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 18:01:15,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-07-09 18:01:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:01:15,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735341668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:15,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:15,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-07-09 18:01:15,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522132201] [2021-07-09 18:01:15,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:15,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:15,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:15,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:15,611 INFO L87 Difference]: Start difference. First operand 31018 states and 137959 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:17,286 INFO L93 Difference]: Finished difference Result 89629 states and 388893 transitions. [2021-07-09 18:01:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:01:17,286 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:01:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:17,410 INFO L225 Difference]: With dead ends: 89629 [2021-07-09 18:01:17,410 INFO L226 Difference]: Without dead ends: 24194 [2021-07-09 18:01:17,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:01:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24194 states. [2021-07-09 18:01:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24194 to 24194. [2021-07-09 18:01:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24194 states, 24193 states have (on average 4.4164014384326045) internal successors, (106846), 24193 states have internal predecessors, (106846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24194 states to 24194 states and 106846 transitions. [2021-07-09 18:01:18,134 INFO L78 Accepts]: Start accepts. Automaton has 24194 states and 106846 transitions. Word has length 41 [2021-07-09 18:01:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:18,134 INFO L482 AbstractCegarLoop]: Abstraction has 24194 states and 106846 transitions. [2021-07-09 18:01:18,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24194 states and 106846 transitions. [2021-07-09 18:01:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:01:18,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:18,192 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 18:01:18,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:18,394 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:18,394 INFO L82 PathProgramCache]: Analyzing trace with hash 579617674, now seen corresponding path program 22 times [2021-07-09 18:01:18,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:18,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291351829] [2021-07-09 18:01:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:01:18,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:18,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291351829] [2021-07-09 18:01:18,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291351829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:18,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407939453] [2021-07-09 18:01:18,459 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 18:01:18,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:18,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:18,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:01:18,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407939453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:18,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:18,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 18:01:18,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098557440] [2021-07-09 18:01:18,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:01:18,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:01:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:18,567 INFO L87 Difference]: Start difference. First operand 24194 states and 106846 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 18:01:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:19,136 INFO L93 Difference]: Finished difference Result 31728 states and 133271 transitions. [2021-07-09 18:01:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:01:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 43 [2021-07-09 18:01:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:19,257 INFO L225 Difference]: With dead ends: 31728 [2021-07-09 18:01:19,257 INFO L226 Difference]: Without dead ends: 31708 [2021-07-09 18:01:19,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:01:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31708 states. [2021-07-09 18:01:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31708 to 20545. [2021-07-09 18:01:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338492990654205) internal successors, (89130), 20544 states have internal predecessors, (89130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89130 transitions. [2021-07-09 18:01:19,973 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89130 transitions. Word has length 43 [2021-07-09 18:01:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:19,973 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89130 transitions. [2021-07-09 18:01:19,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 18:01:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89130 transitions. [2021-07-09 18:01:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:01:20,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:20,202 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 18:01:20,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 18:01:20,409 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash 856538626, now seen corresponding path program 23 times [2021-07-09 18:01:20,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:20,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756913442] [2021-07-09 18:01:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 18:01:20,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756913442] [2021-07-09 18:01:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756913442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682009532] [2021-07-09 18:01:20,446 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 18:01:20,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:01:20,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:20,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:20,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 18:01:20,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682009532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:20,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:01:20,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331250304] [2021-07-09 18:01:20,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:01:20,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:20,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:01:20,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:20,558 INFO L87 Difference]: Start difference. First operand 20545 states and 89130 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 18:01:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:20,847 INFO L93 Difference]: Finished difference Result 25792 states and 107062 transitions. [2021-07-09 18:01:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:01:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 43 [2021-07-09 18:01:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:20,941 INFO L225 Difference]: With dead ends: 25792 [2021-07-09 18:01:20,941 INFO L226 Difference]: Without dead ends: 25788 [2021-07-09 18:01:20,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2021-07-09 18:01:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 20545. [2021-07-09 18:01:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338395638629284) internal successors, (89128), 20544 states have internal predecessors, (89128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89128 transitions. [2021-07-09 18:01:21,587 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89128 transitions. Word has length 43 [2021-07-09 18:01:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:21,588 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89128 transitions. [2021-07-09 18:01:21,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 18:01:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89128 transitions. [2021-07-09 18:01:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:01:21,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:21,636 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 18:01:21,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 18:01:21,853 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1826733498, now seen corresponding path program 24 times [2021-07-09 18:01:21,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:21,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708917868] [2021-07-09 18:01:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:22,034 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:01:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:01:22,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:22,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708917868] [2021-07-09 18:01:22,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708917868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:22,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180892561] [2021-07-09 18:01:22,055 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 18:01:22,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:01:22,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:01:22,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180892561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:22,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:22,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 18:01:22,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092289876] [2021-07-09 18:01:22,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:22,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:22,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:22,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:22,195 INFO L87 Difference]: Start difference. First operand 20545 states and 89128 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 18:01:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:22,541 INFO L93 Difference]: Finished difference Result 29923 states and 123633 transitions. [2021-07-09 18:01:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:22,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 43 [2021-07-09 18:01:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:22,664 INFO L225 Difference]: With dead ends: 29923 [2021-07-09 18:01:22,664 INFO L226 Difference]: Without dead ends: 29911 [2021-07-09 18:01:22,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:01:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29911 states. [2021-07-09 18:01:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29911 to 22182. [2021-07-09 18:01:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22182 states, 22181 states have (on average 4.363960146070962) internal successors, (96797), 22181 states have internal predecessors, (96797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22182 states to 22182 states and 96797 transitions. [2021-07-09 18:01:23,528 INFO L78 Accepts]: Start accepts. Automaton has 22182 states and 96797 transitions. Word has length 43 [2021-07-09 18:01:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:23,528 INFO L482 AbstractCegarLoop]: Abstraction has 22182 states and 96797 transitions. [2021-07-09 18:01:23,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 18:01:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 22182 states and 96797 transitions. [2021-07-09 18:01:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:01:23,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:23,578 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 18:01:23,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:01:23,778 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:23,779 INFO L82 PathProgramCache]: Analyzing trace with hash 733833666, now seen corresponding path program 25 times [2021-07-09 18:01:23,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:23,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363500621] [2021-07-09 18:01:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:01:23,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:23,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363500621] [2021-07-09 18:01:23,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363500621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:23,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346767185] [2021-07-09 18:01:23,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:01:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 18:01:23,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346767185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:23,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:23,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:01:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161200452] [2021-07-09 18:01:23,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:01:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:01:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:01:23,923 INFO L87 Difference]: Start difference. First operand 22182 states and 96797 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 18:01:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:24,296 INFO L93 Difference]: Finished difference Result 34390 states and 141751 transitions. [2021-07-09 18:01:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 43 [2021-07-09 18:01:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:24,824 INFO L225 Difference]: With dead ends: 34390 [2021-07-09 18:01:24,824 INFO L226 Difference]: Without dead ends: 34390 [2021-07-09 18:01:24,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:01:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34390 states. [2021-07-09 18:01:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34390 to 22406. [2021-07-09 18:01:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22406 states, 22405 states have (on average 4.360365989734435) internal successors, (97694), 22405 states have internal predecessors, (97694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22406 states to 22406 states and 97694 transitions. [2021-07-09 18:01:25,636 INFO L78 Accepts]: Start accepts. Automaton has 22406 states and 97694 transitions. Word has length 43 [2021-07-09 18:01:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:25,636 INFO L482 AbstractCegarLoop]: Abstraction has 22406 states and 97694 transitions. [2021-07-09 18:01:25,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 18:01:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 22406 states and 97694 transitions. [2021-07-09 18:01:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:01:25,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:25,688 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 18:01:25,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:25,888 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1750646786, now seen corresponding path program 26 times [2021-07-09 18:01:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454613876] [2021-07-09 18:01:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:01:25,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454613876] [2021-07-09 18:01:25,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454613876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084163733] [2021-07-09 18:01:25,931 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 18:01:25,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:25,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:25,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:01:26,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084163733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:26,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:26,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:01:26,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980789355] [2021-07-09 18:01:26,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:01:26,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:26,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:01:26,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:01:26,034 INFO L87 Difference]: Start difference. First operand 22406 states and 97694 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 18:01:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:26,685 INFO L93 Difference]: Finished difference Result 38562 states and 161998 transitions. [2021-07-09 18:01:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:01:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 43 [2021-07-09 18:01:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:26,838 INFO L225 Difference]: With dead ends: 38562 [2021-07-09 18:01:26,838 INFO L226 Difference]: Without dead ends: 38558 [2021-07-09 18:01:26,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38558 states. [2021-07-09 18:01:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38558 to 29258. [2021-07-09 18:01:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29258 states, 29257 states have (on average 4.442629114399972) internal successors, (129978), 29257 states have internal predecessors, (129978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29258 states to 29258 states and 129978 transitions. [2021-07-09 18:01:27,993 INFO L78 Accepts]: Start accepts. Automaton has 29258 states and 129978 transitions. Word has length 43 [2021-07-09 18:01:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:27,993 INFO L482 AbstractCegarLoop]: Abstraction has 29258 states and 129978 transitions. [2021-07-09 18:01:27,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 18:01:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 29258 states and 129978 transitions. [2021-07-09 18:01:28,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:01:28,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:28,075 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 18:01:28,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:28,276 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1098153854, now seen corresponding path program 27 times [2021-07-09 18:01:28,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:28,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051216591] [2021-07-09 18:01:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:01:28,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051216591] [2021-07-09 18:01:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051216591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293386891] [2021-07-09 18:01:28,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:01:28,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:01:28,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:28,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:01:28,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:01:28,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293386891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:28,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:28,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-07-09 18:01:28,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317099133] [2021-07-09 18:01:28,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:01:28,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:01:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:01:28,499 INFO L87 Difference]: Start difference. First operand 29258 states and 129978 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:31,771 INFO L93 Difference]: Finished difference Result 130071 states and 514816 transitions. [2021-07-09 18:01:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 18:01:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:01:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:32,454 INFO L225 Difference]: With dead ends: 130071 [2021-07-09 18:01:32,454 INFO L226 Difference]: Without dead ends: 127719 [2021-07-09 18:01:32,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6115 ImplicationChecksByTransitivity, 1624.0ms TimeCoverageRelationStatistics Valid=3011, Invalid=10795, Unknown=0, NotChecked=0, Total=13806 [2021-07-09 18:01:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127719 states. [2021-07-09 18:01:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127719 to 39730. [2021-07-09 18:01:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39730 states, 39729 states have (on average 4.411387147927207) internal successors, (175260), 39729 states have internal predecessors, (175260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39730 states to 39730 states and 175260 transitions. [2021-07-09 18:01:35,452 INFO L78 Accepts]: Start accepts. Automaton has 39730 states and 175260 transitions. Word has length 43 [2021-07-09 18:01:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:35,452 INFO L482 AbstractCegarLoop]: Abstraction has 39730 states and 175260 transitions. [2021-07-09 18:01:35,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 39730 states and 175260 transitions. [2021-07-09 18:01:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:01:35,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:35,549 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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 18:01:35,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:35,753 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1617681380, now seen corresponding path program 28 times [2021-07-09 18:01:35,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:35,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757275697] [2021-07-09 18:01:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-09 18:01:35,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:35,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757275697] [2021-07-09 18:01:35,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757275697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:35,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942913350] [2021-07-09 18:01:35,798 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 18:01:35,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:35,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-09 18:01:35,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942913350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:35,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:35,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 18:01:35,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661034202] [2021-07-09 18:01:35,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:35,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:35,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:35,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:35,920 INFO L87 Difference]: Start difference. First operand 39730 states and 175260 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 18:01:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:36,740 INFO L93 Difference]: Finished difference Result 67789 states and 281482 transitions. [2021-07-09 18:01:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:01:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 45 [2021-07-09 18:01:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:37,020 INFO L225 Difference]: With dead ends: 67789 [2021-07-09 18:01:37,020 INFO L226 Difference]: Without dead ends: 67789 [2021-07-09 18:01:37,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:01:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67789 states. [2021-07-09 18:01:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67789 to 42904. [2021-07-09 18:01:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42904 states, 42903 states have (on average 4.394098314803161) internal successors, (188520), 42903 states have internal predecessors, (188520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42904 states to 42904 states and 188520 transitions. [2021-07-09 18:01:38,936 INFO L78 Accepts]: Start accepts. Automaton has 42904 states and 188520 transitions. Word has length 45 [2021-07-09 18:01:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:38,936 INFO L482 AbstractCegarLoop]: Abstraction has 42904 states and 188520 transitions. [2021-07-09 18:01:38,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 18:01:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 42904 states and 188520 transitions. [2021-07-09 18:01:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:01:39,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:39,054 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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 18:01:39,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:39,255 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1352044384, now seen corresponding path program 29 times [2021-07-09 18:01:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:39,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690754599] [2021-07-09 18:01:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-07-09 18:01:39,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:39,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690754599] [2021-07-09 18:01:39,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690754599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838521631] [2021-07-09 18:01:39,300 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 18:01:39,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:01:39,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:01:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:01:39,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838521631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:39,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-09 18:01:39,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272093508] [2021-07-09 18:01:39,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:01:39,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:01:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:01:39,487 INFO L87 Difference]: Start difference. First operand 42904 states and 188520 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:41,933 INFO L93 Difference]: Finished difference Result 115466 states and 489083 transitions. [2021-07-09 18:01:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:01:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:01:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:42,886 INFO L225 Difference]: With dead ends: 115466 [2021-07-09 18:01:42,886 INFO L226 Difference]: Without dead ends: 113950 [2021-07-09 18:01:42,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 803.0ms TimeCoverageRelationStatistics Valid=1536, Invalid=5604, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:01:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113950 states. [2021-07-09 18:01:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113950 to 40933. [2021-07-09 18:01:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 4.4053796540603924) internal successors, (180321), 40932 states have internal predecessors, (180321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 180321 transitions. [2021-07-09 18:01:45,272 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 180321 transitions. Word has length 45 [2021-07-09 18:01:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:45,272 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 180321 transitions. [2021-07-09 18:01:45,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 180321 transitions. [2021-07-09 18:01:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:01:45,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:45,405 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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 18:01:45,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 18:01:45,606 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:45,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1091018938, now seen corresponding path program 30 times [2021-07-09 18:01:45,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:45,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596683184] [2021-07-09 18:01:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-09 18:01:45,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:45,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596683184] [2021-07-09 18:01:45,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596683184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:45,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397157366] [2021-07-09 18:01:45,665 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 18:01:45,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:01:45,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:01:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:45,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-07-09 18:01:45,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:45,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:45,789 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 18:01:45,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-07-09 18:01:45,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:45,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:01:45,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:45,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:45,956 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 18:01:45,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-07-09 18:01:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-07-09 18:01:46,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397157366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:46,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-09 18:01:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336598184] [2021-07-09 18:01:46,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:01:46,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:01:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:01:46,002 INFO L87 Difference]: Start difference. First operand 40933 states and 180321 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,129 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-07-09 18:01:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:49,050 INFO L93 Difference]: Finished difference Result 77213 states and 327298 transitions. [2021-07-09 18:01:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:01:49,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:01:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:49,643 INFO L225 Difference]: With dead ends: 77213 [2021-07-09 18:01:49,643 INFO L226 Difference]: Without dead ends: 76984 [2021-07-09 18:01:49,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1763.6ms TimeCoverageRelationStatistics Valid=1363, Invalid=5117, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:01:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76984 states. [2021-07-09 18:01:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76984 to 44638. [2021-07-09 18:01:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44638 states, 44637 states have (on average 4.39812263368954) internal successors, (196319), 44637 states have internal predecessors, (196319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44638 states to 44638 states and 196319 transitions. [2021-07-09 18:01:51,374 INFO L78 Accepts]: Start accepts. Automaton has 44638 states and 196319 transitions. Word has length 45 [2021-07-09 18:01:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:51,374 INFO L482 AbstractCegarLoop]: Abstraction has 44638 states and 196319 transitions. [2021-07-09 18:01:51,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44638 states and 196319 transitions. [2021-07-09 18:01:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:01:51,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:51,486 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 18:01:51,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:51,688 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash -218983474, now seen corresponding path program 31 times [2021-07-09 18:01:51,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:51,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558647838] [2021-07-09 18:01:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-09 18:01:51,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:51,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558647838] [2021-07-09 18:01:51,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558647838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:51,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2157703] [2021-07-09 18:01:51,940 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 18:01:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:01:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:01:52,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:01:52,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:52,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:01:52,219 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-07-09 18:01:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-07-09 18:01:52,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-07-09 18:01:52,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:52,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:01:52,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:45 [2021-07-09 18:01:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-07-09 18:01:52,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:52,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-07-09 18:01:52,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:52,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:01:52,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-07-09 18:01:52,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:52,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-09 18:01:52,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:52,971 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:01:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:01:52,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,984 INFO L628 ElimStorePlain]: treesize reduction 74, result has 6.3 percent of original size [2021-07-09 18:01:52,985 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-07-09 18:01:52,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:52,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-07-09 18:01:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:01:53,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2157703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:53,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:53,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-07-09 18:01:53,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299012163] [2021-07-09 18:01:53,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:01:53,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:01:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:01:53,008 INFO L87 Difference]: Start difference. First operand 44638 states and 196319 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:54,289 INFO L93 Difference]: Finished difference Result 57374 states and 249695 transitions. [2021-07-09 18:01:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:01:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:01:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:54,290 INFO L225 Difference]: With dead ends: 57374 [2021-07-09 18:01:54,290 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 18:01:54,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 959.8ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:01:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 18:01:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 18:01:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 18:01:54,291 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-07-09 18:01:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:54,291 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 18:01:54,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 18:01:54,291 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 18:01:54,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:01:54,507 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:01:54,509 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:01:54 BasicIcfg [2021-07-09 18:01:54,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:01:54,509 INFO L168 Benchmark]: Toolchain (without parser) took 76036.42 ms. Allocated memory was 184.5 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 164.2 MB in the beginning and 7.3 GB in the end (delta: -7.1 GB). Peak memory consumption was 3.8 GB. Max. memory is 8.0 GB. [2021-07-09 18:01:54,510 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 184.5 MB. Free memory is still 165.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:01:54,510 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.69 ms. Allocated memory is still 184.5 MB. Free memory was 164.1 MB in the beginning and 162.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:01:54,510 INFO L168 Benchmark]: Boogie Preprocessor took 16.06 ms. Allocated memory is still 184.5 MB. Free memory was 162.6 MB in the beginning and 161.7 MB in the end (delta: 946.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:01:54,510 INFO L168 Benchmark]: RCFGBuilder took 359.48 ms. Allocated memory is still 184.5 MB. Free memory was 161.6 MB in the beginning and 147.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:01:54,510 INFO L168 Benchmark]: TraceAbstraction took 75632.75 ms. Allocated memory was 184.5 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 147.2 MB in the beginning and 7.3 GB in the end (delta: -7.1 GB). Peak memory consumption was 3.7 GB. Max. memory is 8.0 GB. [2021-07-09 18:01:54,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 184.5 MB. Free memory is still 165.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.69 ms. Allocated memory is still 184.5 MB. Free memory was 164.1 MB in the beginning and 162.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.06 ms. Allocated memory is still 184.5 MB. Free memory was 162.6 MB in the beginning and 161.7 MB in the end (delta: 946.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 359.48 ms. Allocated memory is still 184.5 MB. Free memory was 161.6 MB in the beginning and 147.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 75632.75 ms. Allocated memory was 184.5 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 147.2 MB in the beginning and 7.3 GB in the end (delta: -7.1 GB). Peak memory consumption was 3.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 75547.6ms, OverallIterations: 41, TraceHistogramMax: 4, EmptinessCheckTime: 1658.4ms, AutomataDifference: 33644.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 77.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2344 SDtfs, 11041 SDslu, 13732 SDs, 0 SdLazy, 11972 SolverSat, 1708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6876.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2258 GetRequests, 1229 SyntacticMatches, 29 SemanticMatches, 1000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18814 ImplicationChecksByTransitivity, 13506.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44638occurred in iteration=40, InterpolantAutomatonStates: 957, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21283.0ms AutomataMinimizationTime, 41 MinimizatonAttempts, 356399 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 248.2ms SsaConstructionTime, 814.1ms SatisfiabilityAnalysisTime, 9559.1ms InterpolantComputationTime, 2703 NumberOfCodeBlocks, 2696 NumberOfCodeBlocksAsserted, 135 NumberOfCheckSat, 2628 ConstructedInterpolants, 4 QuantifiedInterpolants, 13598 SizeOfPredicates, 80 NumberOfNonLiveVariables, 3451 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 75 InterpolantComputations, 7 PerfectInterpolantSequences, 778/1413 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...