/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-uCc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:49:28,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:49:28,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:49:28,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 19:49:28,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 19:49:28,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 19:49:28,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 19:49:28,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 19:49:28,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 19:49:28,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 19:49:28,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 19:49:28,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 19:49:28,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 19:49:28,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 19:49:28,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 19:49:28,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 19:49:28,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 19:49:28,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 19:49:28,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 19:49:28,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 19:49:28,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 19:49:28,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 19:49:28,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 19:49:28,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 19:49:28,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 19:49:28,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 19:49:28,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 19:49:28,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 19:49:28,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 19:49:28,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 19:49:28,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 19:49:28,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 19:49:28,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 19:49:28,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 19:49:28,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 19:49:28,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 19:49:28,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 19:49:28,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 19:49:28,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 19:49:28,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 19:49:28,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 19:49:28,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 19:49:28,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:49:28,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:49:28,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:49:28,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:49:28,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:49:28,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:49:28,522 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:49:28,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:49:28,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:49:28,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:49:28,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:49:28,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:49:28,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:49:28,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:49:28,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:49:28,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:49:28,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:49:28,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:49:28,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:49:28,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:49:28,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:49:28,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:49:28,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:49:28,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:49:28,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:49:28,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:49:28,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:49:28,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:49:28,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:49:28,526 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:49:28,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:49:28,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:49:28,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:49:28,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:49:28,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:49:28,872 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:49:28,874 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:49:28,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-uCc.wvr.bpl [2021-02-19 19:49:28,875 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-uCc.wvr.bpl' [2021-02-19 19:49:28,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:49:28,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:49:28,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:49:28,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:49:28,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:49:28,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:49:28,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:49:28,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:49:28,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:49:28,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... [2021-02-19 19:49:28,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:49:28,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:49:28,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:49:28,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:49:28,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:49:29,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:49:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:49:29,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:49:29,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:49:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:49:29,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:49:29,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:49:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:49:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:49:29,044 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:49:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:49:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:49:29,044 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 19:49:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 19:49:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 19:49:29,045 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:49:29,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:49:29,274 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:49:29,276 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:49:29 BoogieIcfgContainer [2021-02-19 19:49:29,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:49:29,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:49:29,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:49:29,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:49:29,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:49:28" (1/2) ... [2021-02-19 19:49:29,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79eadbc9 and model type counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:49:29, skipping insertion in model container [2021-02-19 19:49:29,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-uCc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:49:29" (2/2) ... [2021-02-19 19:49:29,281 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-uCc.wvr.bpl [2021-02-19 19:49:29,286 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:49:29,286 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:49:29,289 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:49:29,289 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:49:29,359 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 19:49:29,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 19:49:29,410 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:49:29,410 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:49:29,410 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:49:29,411 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:49:29,411 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:49:29,411 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:49:29,411 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:49:29,411 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:49:29,418 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-02-19 19:49:29,484 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:49:29,509 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:29,509 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:29,510 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1637270876, now seen corresponding path program 1 times [2021-02-19 19:49:29,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:29,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081165902] [2021-02-19 19:49:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:29,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081165902] [2021-02-19 19:49:29,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:29,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 19:49:29,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640403041] [2021-02-19 19:49:29,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 19:49:29,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 19:49:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:49:29,730 INFO L87 Difference]: Start difference. First operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:29,805 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-02-19 19:49:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 19:49:29,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 19:49:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:29,833 INFO L225 Difference]: With dead ends: 856 [2021-02-19 19:49:29,834 INFO L226 Difference]: Without dead ends: 731 [2021-02-19 19:49:29,835 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 19:49:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-02-19 19:49:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-02-19 19:49:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-02-19 19:49:29,941 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-02-19 19:49:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:29,942 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-02-19 19:49:29,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-02-19 19:49:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:49:29,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:29,945 INFO L506 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] [2021-02-19 19:49:29,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:49:29,946 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1599248802, now seen corresponding path program 1 times [2021-02-19 19:49:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:29,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873454750] [2021-02-19 19:49:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:30,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873454750] [2021-02-19 19:49:30,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302023241] [2021-02-19 19:49:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:49:30,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:30,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:30,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-02-19 19:49:30,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746190824] [2021-02-19 19:49:30,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:49:30,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:49:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:49:30,239 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:30,322 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-02-19 19:49:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:30,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:49:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:30,333 INFO L225 Difference]: With dead ends: 1527 [2021-02-19 19:49:30,334 INFO L226 Difference]: Without dead ends: 1527 [2021-02-19 19:49:30,334 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:49:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-02-19 19:49:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-02-19 19:49:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.77511961722488) internal successors, (3156), 836 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-02-19 19:49:30,374 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-02-19 19:49:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:30,374 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-02-19 19:49:30,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-02-19 19:49:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:49:30,377 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:30,377 INFO L506 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] [2021-02-19 19:49:30,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 19:49:30,584 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1154767714, now seen corresponding path program 1 times [2021-02-19 19:49:30,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:30,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055195773] [2021-02-19 19:49:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:30,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055195773] [2021-02-19 19:49:30,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:30,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:49:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831474389] [2021-02-19 19:49:30,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:49:30,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:49:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:30,654 INFO L87 Difference]: Start difference. First operand 837 states and 3156 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) 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) [2021-02-19 19:49:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:30,746 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-02-19 19:49:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) 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 [2021-02-19 19:49:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:30,757 INFO L225 Difference]: With dead ends: 1186 [2021-02-19 19:49:30,757 INFO L226 Difference]: Without dead ends: 1076 [2021-02-19 19:49:30,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:49:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-02-19 19:49:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-02-19 19:49:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.798507462686567) internal successors, (3054), 804 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-02-19 19:49:30,794 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-02-19 19:49:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:30,795 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-02-19 19:49:30,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) 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) [2021-02-19 19:49:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-02-19 19:49:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:49:30,797 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:30,798 INFO L506 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] [2021-02-19 19:49:30,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 19:49:30,798 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:30,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1574020586, now seen corresponding path program 2 times [2021-02-19 19:49:30,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:30,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89919254] [2021-02-19 19:49:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:30,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89919254] [2021-02-19 19:49:30,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:30,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:49:30,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721032479] [2021-02-19 19:49:30,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:49:30,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:49:30,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:49:30,868 INFO L87 Difference]: Start difference. First operand 805 states and 3054 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-02-19 19:49:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:30,922 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-02-19 19:49:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:49:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 [2021-02-19 19:49:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:30,930 INFO L225 Difference]: With dead ends: 1022 [2021-02-19 19:49:30,930 INFO L226 Difference]: Without dead ends: 1022 [2021-02-19 19:49:30,930 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-02-19 19:49:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-02-19 19:49:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.75177304964539) internal successors, (3174), 846 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-02-19 19:49:30,970 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-02-19 19:49:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:30,970 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-02-19 19:49:30,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-02-19 19:49:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-02-19 19:49:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:49:30,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:30,973 INFO L506 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] [2021-02-19 19:49:30,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 19:49:30,974 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1111080982, now seen corresponding path program 2 times [2021-02-19 19:49:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:30,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005808509] [2021-02-19 19:49:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:31,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005808509] [2021-02-19 19:49:31,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:31,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:49:31,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719470596] [2021-02-19 19:49:31,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:49:31,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:31,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:49:31,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:31,065 INFO L87 Difference]: Start difference. First operand 847 states and 3174 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) 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) [2021-02-19 19:49:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:31,140 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-02-19 19:49:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) 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 [2021-02-19 19:49:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:31,149 INFO L225 Difference]: With dead ends: 1324 [2021-02-19 19:49:31,149 INFO L226 Difference]: Without dead ends: 1288 [2021-02-19 19:49:31,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:49:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-02-19 19:49:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-02-19 19:49:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.7387892376681613) internal successors, (3335), 892 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-02-19 19:49:31,203 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-02-19 19:49:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:31,204 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-02-19 19:49:31,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) 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) [2021-02-19 19:49:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-02-19 19:49:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:49:31,207 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:31,207 INFO L506 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] [2021-02-19 19:49:31,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 19:49:31,208 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:31,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1400978386, now seen corresponding path program 3 times [2021-02-19 19:49:31,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:31,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941838709] [2021-02-19 19:49:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:31,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941838709] [2021-02-19 19:49:31,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:31,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:49:31,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991514813] [2021-02-19 19:49:31,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:49:31,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:31,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:49:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:49:31,302 INFO L87 Difference]: Start difference. First operand 893 states and 3335 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-02-19 19:49:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:31,361 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-02-19 19:49:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:49:31,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 [2021-02-19 19:49:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:31,372 INFO L225 Difference]: With dead ends: 1414 [2021-02-19 19:49:31,372 INFO L226 Difference]: Without dead ends: 1392 [2021-02-19 19:49:31,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-02-19 19:49:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-02-19 19:49:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.8140794223826715) internal successors, (4226), 1108 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-02-19 19:49:31,417 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-02-19 19:49:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:31,417 INFO L480 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-02-19 19:49:31,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-02-19 19:49:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-02-19 19:49:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:49:31,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:31,421 INFO L506 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] [2021-02-19 19:49:31,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 19:49:31,422 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1790940114, now seen corresponding path program 4 times [2021-02-19 19:49:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:31,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840644951] [2021-02-19 19:49:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:31,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840644951] [2021-02-19 19:49:31,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:31,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:49:31,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345028463] [2021-02-19 19:49:31,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:49:31,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:49:31,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:31,464 INFO L87 Difference]: Start difference. First operand 1109 states and 4226 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) 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) [2021-02-19 19:49:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:31,500 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-02-19 19:49:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:49:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) 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 [2021-02-19 19:49:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:31,509 INFO L225 Difference]: With dead ends: 1451 [2021-02-19 19:49:31,510 INFO L226 Difference]: Without dead ends: 1451 [2021-02-19 19:49:31,510 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-02-19 19:49:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-02-19 19:49:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.8230088495575223) internal successors, (4320), 1130 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-02-19 19:49:31,551 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-02-19 19:49:31,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:31,551 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-02-19 19:49:31,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) 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) [2021-02-19 19:49:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-02-19 19:49:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:49:31,555 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:31,555 INFO L506 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] [2021-02-19 19:49:31,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 19:49:31,555 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash 584577826, now seen corresponding path program 1 times [2021-02-19 19:49:31,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:31,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277970169] [2021-02-19 19:49:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277970169] [2021-02-19 19:49:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474142601] [2021-02-19 19:49:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:49:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:31,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:31,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-02-19 19:49:31,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141711304] [2021-02-19 19:49:31,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:49:31,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:49:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:49:31,756 INFO L87 Difference]: Start difference. First operand 1131 states and 4320 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:31,846 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-02-19 19:49:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:31,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:49:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:31,858 INFO L225 Difference]: With dead ends: 1625 [2021-02-19 19:49:31,858 INFO L226 Difference]: Without dead ends: 1546 [2021-02-19 19:49:31,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:49:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-02-19 19:49:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-02-19 19:49:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.819158460161146) internal successors, (4266), 1117 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-02-19 19:49:31,897 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-02-19 19:49:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:31,898 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-02-19 19:49:31,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-02-19 19:49:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:49:31,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:31,903 INFO L506 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] [2021-02-19 19:49:32,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:32,115 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:32,116 INFO L82 PathProgramCache]: Analyzing trace with hash 881593696, now seen corresponding path program 2 times [2021-02-19 19:49:32,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:32,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745653711] [2021-02-19 19:49:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:32,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745653711] [2021-02-19 19:49:32,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:32,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:49:32,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068251461] [2021-02-19 19:49:32,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:49:32,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:49:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:49:32,158 INFO L87 Difference]: Start difference. First operand 1118 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:32,192 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-02-19 19:49:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:49:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 [2021-02-19 19:49:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:32,201 INFO L225 Difference]: With dead ends: 1338 [2021-02-19 19:49:32,201 INFO L226 Difference]: Without dead ends: 1338 [2021-02-19 19:49:32,201 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:49:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-02-19 19:49:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-02-19 19:49:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.795936395759717) internal successors, (4297), 1132 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-02-19 19:49:32,244 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-02-19 19:49:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:32,244 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-02-19 19:49:32,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-02-19 19:49:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:49:32,251 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:32,251 INFO L506 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] [2021-02-19 19:49:32,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 19:49:32,252 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:32,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1613685780, now seen corresponding path program 1 times [2021-02-19 19:49:32,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:32,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258783294] [2021-02-19 19:49:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:32,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258783294] [2021-02-19 19:49:32,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251616314] [2021-02-19 19:49:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:49:32,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:32,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:32,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-02-19 19:49:32,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044674005] [2021-02-19 19:49:32,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:49:32,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:32,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:49:32,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:49:32,492 INFO L87 Difference]: Start difference. First operand 1133 states and 4297 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:32,562 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-02-19 19:49:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:49:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:32,590 INFO L225 Difference]: With dead ends: 1711 [2021-02-19 19:49:32,590 INFO L226 Difference]: Without dead ends: 1659 [2021-02-19 19:49:32,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:49:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-02-19 19:49:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-02-19 19:49:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.7871376811594204) internal successors, (4181), 1104 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-02-19 19:49:32,635 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-02-19 19:49:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:32,635 INFO L480 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-02-19 19:49:32,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-02-19 19:49:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:49:32,640 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:32,640 INFO L506 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] [2021-02-19 19:49:32,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:49:32,862 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1538936528, now seen corresponding path program 3 times [2021-02-19 19:49:32,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:32,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949513235] [2021-02-19 19:49:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:32,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949513235] [2021-02-19 19:49:32,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:49:32,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:49:32,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976329656] [2021-02-19 19:49:32,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:49:32,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:49:32,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:49:32,893 INFO L87 Difference]: Start difference. First operand 1105 states and 4181 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:32,928 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-02-19 19:49:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:49:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 [2021-02-19 19:49:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:32,933 INFO L225 Difference]: With dead ends: 1111 [2021-02-19 19:49:32,933 INFO L226 Difference]: Without dead ends: 946 [2021-02-19 19:49:32,933 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-02-19 19:49:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-02-19 19:49:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-02-19 19:49:32,958 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-02-19 19:49:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:32,958 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-02-19 19:49:32,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-02-19 19:49:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:49:32,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:32,961 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:32,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 19:49:32,961 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash 149435684, now seen corresponding path program 1 times [2021-02-19 19:49:32,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:32,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232756968] [2021-02-19 19:49:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:33,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232756968] [2021-02-19 19:49:33,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353785561] [2021-02-19 19:49:33,012 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 [2021-02-19 19:49:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:33,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 19:49:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:33,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:33,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-02-19 19:49:33,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332045350] [2021-02-19 19:49:33,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:49:33,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:49:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:49:33,125 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:33,186 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-02-19 19:49:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:49:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:33,196 INFO L225 Difference]: With dead ends: 2765 [2021-02-19 19:49:33,196 INFO L226 Difference]: Without dead ends: 2631 [2021-02-19 19:49:33,197 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:49:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-02-19 19:49:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-02-19 19:49:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-02-19 19:49:33,260 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-02-19 19:49:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:33,260 INFO L480 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-02-19 19:49:33,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-02-19 19:49:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:49:33,266 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:33,266 INFO L506 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] [2021-02-19 19:49:33,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:33,482 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:33,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1119756894, now seen corresponding path program 2 times [2021-02-19 19:49:33,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:33,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104537960] [2021-02-19 19:49:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:49:33,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104537960] [2021-02-19 19:49:33,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14283279] [2021-02-19 19:49:33,541 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 [2021-02-19 19:49:33,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:49:33,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 19:49:33,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:33,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-02-19 19:49:33,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550898252] [2021-02-19 19:49:33,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:49:33,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:33,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:49:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:49:33,670 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-02-19 19:49:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:33,806 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-02-19 19:49:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:49:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:33,825 INFO L225 Difference]: With dead ends: 2660 [2021-02-19 19:49:33,825 INFO L226 Difference]: Without dead ends: 2660 [2021-02-19 19:49:33,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:49:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-02-19 19:49:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-02-19 19:49:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-02-19 19:49:33,914 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-02-19 19:49:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:33,914 INFO L480 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-02-19 19:49:33,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-02-19 19:49:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-02-19 19:49:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:49:33,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:33,954 INFO L506 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] [2021-02-19 19:49:34,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 19:49:34,155 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1349853578, now seen corresponding path program 1 times [2021-02-19 19:49:34,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:34,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615941827] [2021-02-19 19:49:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:34,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615941827] [2021-02-19 19:49:34,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835163918] [2021-02-19 19:49:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 19:49:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:49:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:34,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:34,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-02-19 19:49:34,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172671226] [2021-02-19 19:49:34,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:49:34,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:34,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:49:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:49:34,363 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) 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) [2021-02-19 19:49:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:34,438 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-02-19 19:49:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:49:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) 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 29 [2021-02-19 19:49:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:34,447 INFO L225 Difference]: With dead ends: 2794 [2021-02-19 19:49:34,447 INFO L226 Difference]: Without dead ends: 2640 [2021-02-19 19:49:34,447 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:49:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-02-19 19:49:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-02-19 19:49:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-02-19 19:49:34,499 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-02-19 19:49:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:34,500 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-02-19 19:49:34,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) 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) [2021-02-19 19:49:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-02-19 19:49:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:49:34,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:34,505 INFO L506 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] [2021-02-19 19:49:34,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:34,727 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 525464300, now seen corresponding path program 2 times [2021-02-19 19:49:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:34,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880328704] [2021-02-19 19:49:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880328704] [2021-02-19 19:49:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080850944] [2021-02-19 19:49:34,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:34,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:49:34,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 19:49:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:34,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:34,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-02-19 19:49:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782528581] [2021-02-19 19:49:34,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 19:49:34,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 19:49:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:49:34,907 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:35,026 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-02-19 19:49:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 19:49:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:49:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:35,047 INFO L225 Difference]: With dead ends: 5257 [2021-02-19 19:49:35,047 INFO L226 Difference]: Without dead ends: 4937 [2021-02-19 19:49:35,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:49:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-02-19 19:49:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-02-19 19:49:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-02-19 19:49:35,152 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-02-19 19:49:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:35,152 INFO L480 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-02-19 19:49:35,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-02-19 19:49:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:49:35,162 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:35,162 INFO L506 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] [2021-02-19 19:49:35,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:49:35,378 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash 269498080, now seen corresponding path program 3 times [2021-02-19 19:49:35,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:35,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617974874] [2021-02-19 19:49:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:35,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617974874] [2021-02-19 19:49:35,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802886349] [2021-02-19 19:49:35,435 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:35,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:49:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:35,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:35,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-02-19 19:49:35,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521212705] [2021-02-19 19:49:35,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:49:35,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:49:35,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:49:35,627 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:36,278 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-02-19 19:49:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:49:36,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:49:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:36,324 INFO L225 Difference]: With dead ends: 11182 [2021-02-19 19:49:36,325 INFO L226 Difference]: Without dead ends: 10794 [2021-02-19 19:49:36,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:49:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-02-19 19:49:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-02-19 19:49:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-02-19 19:49:36,566 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-02-19 19:49:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:36,567 INFO L480 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-02-19 19:49:36,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-02-19 19:49:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:49:36,643 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:36,644 INFO L506 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] [2021-02-19 19:49:36,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 19:49:36,845 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:36,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:36,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1810083148, now seen corresponding path program 4 times [2021-02-19 19:49:36,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:36,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275210265] [2021-02-19 19:49:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:36,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275210265] [2021-02-19 19:49:36,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871395635] [2021-02-19 19:49:36,911 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 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 [2021-02-19 19:49:36,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:49:36,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:36,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:37,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:37,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 19:49:37,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308357840] [2021-02-19 19:49:37,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:49:37,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:49:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:49:37,057 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:37,287 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-02-19 19:49:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:49:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:49:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:37,347 INFO L225 Difference]: With dead ends: 14551 [2021-02-19 19:49:37,348 INFO L226 Difference]: Without dead ends: 13651 [2021-02-19 19:49:37,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:49:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-02-19 19:49:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-02-19 19:49:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-02-19 19:49:37,733 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-02-19 19:49:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:37,733 INFO L480 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-02-19 19:49:37,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-02-19 19:49:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:49:37,759 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:37,759 INFO L506 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] [2021-02-19 19:49:37,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 19:49:37,966 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1786886104, now seen corresponding path program 5 times [2021-02-19 19:49:37,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:37,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423293149] [2021-02-19 19:49:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:38,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423293149] [2021-02-19 19:49:38,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526398335] [2021-02-19 19:49:38,079 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:38,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:49:38,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:38,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:38,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-02-19 19:49:38,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505270876] [2021-02-19 19:49:38,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:49:38,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:49:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:49:38,235 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 19:49:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:38,750 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-02-19 19:49:38,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:49:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 31 [2021-02-19 19:49:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:38,890 INFO L225 Difference]: With dead ends: 24527 [2021-02-19 19:49:38,891 INFO L226 Difference]: Without dead ends: 24223 [2021-02-19 19:49:38,891 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:49:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-02-19 19:49:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-02-19 19:49:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-02-19 19:49:39,544 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-02-19 19:49:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:39,545 INFO L480 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-02-19 19:49:39,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 19:49:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-02-19 19:49:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:49:39,584 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:39,584 INFO L506 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] [2021-02-19 19:49:39,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:49:39,798 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:39,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2050033960, now seen corresponding path program 6 times [2021-02-19 19:49:39,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:39,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038954407] [2021-02-19 19:49:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:39,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038954407] [2021-02-19 19:49:39,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843578351] [2021-02-19 19:49:39,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:39,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:49:39,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:49:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:40,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:40,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-02-19 19:49:40,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697113266] [2021-02-19 19:49:40,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:49:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:49:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:49:40,013 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 19:49:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:41,066 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-02-19 19:49:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:49:41,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 31 [2021-02-19 19:49:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:41,450 INFO L225 Difference]: With dead ends: 61524 [2021-02-19 19:49:41,450 INFO L226 Difference]: Without dead ends: 60380 [2021-02-19 19:49:41,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:49:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-02-19 19:49:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-02-19 19:49:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-02-19 19:49:42,978 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-02-19 19:49:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:42,978 INFO L480 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-02-19 19:49:42,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 19:49:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-02-19 19:49:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:49:43,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:43,070 INFO L506 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] [2021-02-19 19:49:43,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:43,270 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -528423828, now seen corresponding path program 7 times [2021-02-19 19:49:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:43,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012402988] [2021-02-19 19:49:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:43,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012402988] [2021-02-19 19:49:43,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057813472] [2021-02-19 19:49:43,337 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:43,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:49:43,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:49:43,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:43,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 19:49:43,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348461433] [2021-02-19 19:49:43,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:49:43,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:49:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:49:43,462 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 19:49:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:44,002 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-02-19 19:49:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:49:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 31 [2021-02-19 19:49:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:44,307 INFO L225 Difference]: With dead ends: 44403 [2021-02-19 19:49:44,307 INFO L226 Difference]: Without dead ends: 44271 [2021-02-19 19:49:44,307 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:49:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-02-19 19:49:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-02-19 19:49:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-02-19 19:49:45,411 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-02-19 19:49:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:45,411 INFO L480 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-02-19 19:49:45,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 19:49:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-02-19 19:49:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:49:45,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:45,505 INFO L506 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] [2021-02-19 19:49:45,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:45,727 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 655824168, now seen corresponding path program 8 times [2021-02-19 19:49:45,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:45,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051048074] [2021-02-19 19:49:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:45,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051048074] [2021-02-19 19:49:45,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677996903] [2021-02-19 19:49:45,827 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:45,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:49:45,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:45,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:46,162 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-02-19 19:49:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:46,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:46,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-02-19 19:49:46,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385341442] [2021-02-19 19:49:46,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:49:46,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:46,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:49:46,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:49:46,235 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:47,591 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-02-19 19:49:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:49:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:49:47,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:47,852 INFO L225 Difference]: With dead ends: 66403 [2021-02-19 19:49:47,852 INFO L226 Difference]: Without dead ends: 64922 [2021-02-19 19:49:47,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:49:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-02-19 19:49:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-02-19 19:49:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-02-19 19:49:49,075 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-02-19 19:49:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:49,075 INFO L480 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-02-19 19:49:49,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-02-19 19:49:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:49:49,152 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:49,152 INFO L506 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] [2021-02-19 19:49:49,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 19:49:49,354 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1461405488, now seen corresponding path program 9 times [2021-02-19 19:49:49,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:49,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370866908] [2021-02-19 19:49:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:49,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370866908] [2021-02-19 19:49:49,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934477371] [2021-02-19 19:49:49,405 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:49,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:49:49,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:49,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:49,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:49,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 19:49:49,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774863744] [2021-02-19 19:49:49,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:49:49,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:49:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:49:49,535 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 19:49:49,802 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2021-02-19 19:49:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:50,804 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-02-19 19:49:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:49:50,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 [2021-02-19 19:49:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:51,086 INFO L225 Difference]: With dead ends: 67837 [2021-02-19 19:49:51,087 INFO L226 Difference]: Without dead ends: 67411 [2021-02-19 19:49:51,087 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:49:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-02-19 19:49:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-02-19 19:49:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-02-19 19:49:52,916 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-02-19 19:49:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:52,916 INFO L480 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-02-19 19:49:52,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 19:49:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-02-19 19:49:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:49:52,998 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:52,998 INFO L506 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] [2021-02-19 19:49:53,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:53,199 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash -980349854, now seen corresponding path program 10 times [2021-02-19 19:49:53,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:53,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122177811] [2021-02-19 19:49:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:53,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122177811] [2021-02-19 19:49:53,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409579974] [2021-02-19 19:49:53,259 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:53,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:49:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:49:53,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:53,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 19:49:53,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621371601] [2021-02-19 19:49:53,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:49:53,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:49:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:49:53,375 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 19:49:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:53,791 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-02-19 19:49:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:49:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 33 [2021-02-19 19:49:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:53,990 INFO L225 Difference]: With dead ends: 54540 [2021-02-19 19:49:53,990 INFO L226 Difference]: Without dead ends: 54365 [2021-02-19 19:49:53,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:49:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-02-19 19:49:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-02-19 19:49:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-02-19 19:49:55,791 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-02-19 19:49:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:55,791 INFO L480 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-02-19 19:49:55,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-02-19 19:49:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-02-19 19:49:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:49:55,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:55,905 INFO L506 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] [2021-02-19 19:49:56,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 19:49:56,105 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:56,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:56,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1775110450, now seen corresponding path program 11 times [2021-02-19 19:49:56,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:56,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954353448] [2021-02-19 19:49:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:56,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954353448] [2021-02-19 19:49:56,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939452647] [2021-02-19 19:49:56,165 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:56,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:49:56,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:49:56,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:49:56,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:56,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 19:49:56,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984450113] [2021-02-19 19:49:56,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:49:56,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:49:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:49:56,295 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:56,758 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-02-19 19:49:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:49:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:49:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:56,982 INFO L225 Difference]: With dead ends: 55576 [2021-02-19 19:49:56,983 INFO L226 Difference]: Without dead ends: 55382 [2021-02-19 19:49:56,983 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:49:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-02-19 19:49:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-02-19 19:49:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44604 states, 44603 states have (on average 4.71378606820169) internal successors, (210249), 44603 states have internal predecessors, (210249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-02-19 19:49:59,020 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-02-19 19:49:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:59,021 INFO L480 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-02-19 19:49:59,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-02-19 19:49:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:49:59,149 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:59,149 INFO L506 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] [2021-02-19 19:49:59,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:59,349 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:59,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1136154250, now seen corresponding path program 12 times [2021-02-19 19:49:59,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:59,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541692948] [2021-02-19 19:49:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:59,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541692948] [2021-02-19 19:49:59,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360469346] [2021-02-19 19:49:59,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:59,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:49:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:59,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:49:59,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:49:59,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:59,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-02-19 19:49:59,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933940371] [2021-02-19 19:49:59,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:49:59,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:59,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:49:59,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:49:59,547 INFO L87 Difference]: Start difference. First operand 44604 states and 210249 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 19:50:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:50:01,615 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-02-19 19:50:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:50:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 33 [2021-02-19 19:50:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:50:02,326 INFO L225 Difference]: With dead ends: 141398 [2021-02-19 19:50:02,327 INFO L226 Difference]: Without dead ends: 140699 [2021-02-19 19:50:02,328 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:50:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-02-19 19:50:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-02-19 19:50:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85571 states, 85570 states have (on average 4.762369989482295) internal successors, (407516), 85570 states have internal predecessors, (407516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-02-19 19:50:07,006 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-02-19 19:50:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:50:07,006 INFO L480 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-02-19 19:50:07,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 19:50:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-02-19 19:50:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:50:07,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:50:07,284 INFO L506 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] [2021-02-19 19:50:07,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 19:50:07,484 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:50:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:50:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2121326250, now seen corresponding path program 13 times [2021-02-19 19:50:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:50:07,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964202605] [2021-02-19 19:50:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:50:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:50:07,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964202605] [2021-02-19 19:50:07,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539699580] [2021-02-19 19:50:07,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:50:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:50:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:50:07,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:50:07,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-02-19 19:50:07,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926378703] [2021-02-19 19:50:07,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:50:07,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:50:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:50:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:50:07,692 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 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) [2021-02-19 19:50:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:50:10,250 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-02-19 19:50:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:50:10,250 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 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 35 [2021-02-19 19:50:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:50:12,183 INFO L225 Difference]: With dead ends: 205700 [2021-02-19 19:50:12,184 INFO L226 Difference]: Without dead ends: 204198 [2021-02-19 19:50:12,184 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:50:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-02-19 19:50:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-02-19 19:50:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179419 states, 179418 states have (on average 4.730361502190416) internal successors, (848712), 179418 states have internal predecessors, (848712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-02-19 19:50:20,254 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-02-19 19:50:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:50:20,255 INFO L480 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-02-19 19:50:20,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 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) [2021-02-19 19:50:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-02-19 19:50:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:50:20,810 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:50:20,810 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:50:21,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 19:50:21,014 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:50:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:50:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash -935992796, now seen corresponding path program 14 times [2021-02-19 19:50:21,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:50:21,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877831871] [2021-02-19 19:50:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:50:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:50:21,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877831871] [2021-02-19 19:50:21,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171836676] [2021-02-19 19:50:21,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:22,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:50:22,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:50:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:50:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:50:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 19:50:22,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:50:22,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-02-19 19:50:22,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190115197] [2021-02-19 19:50:22,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:50:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:50:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:50:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:50:22,144 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 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) [2021-02-19 19:50:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:50:26,934 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-02-19 19:50:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:50:26,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 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 35 [2021-02-19 19:50:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:50:29,854 INFO L225 Difference]: With dead ends: 389060 [2021-02-19 19:50:29,854 INFO L226 Difference]: Without dead ends: 387773 [2021-02-19 19:50:29,855 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:50:30,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-02-19 19:50:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-02-19 19:50:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285677 states, 285676 states have (on average 4.812798414987609) internal successors, (1374901), 285676 states have internal predecessors, (1374901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-02-19 19:50:41,979 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-02-19 19:50:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:50:41,979 INFO L480 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-02-19 19:50:41,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 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) [2021-02-19 19:50:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-02-19 19:50:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:50:43,742 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:50:43,742 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:50:43,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 19:50:43,943 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:50:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:50:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1370792740, now seen corresponding path program 15 times [2021-02-19 19:50:43,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:50:43,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197952766] [2021-02-19 19:50:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:50:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:50:44,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197952766] [2021-02-19 19:50:44,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833698339] [2021-02-19 19:50:44,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:44,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:50:44,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:50:44,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:50:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:50:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 19:50:44,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:50:44,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-02-19 19:50:44,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373475769] [2021-02-19 19:50:44,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:50:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:50:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:50:44,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:50:44,114 INFO L87 Difference]: Start difference. First operand 285677 states and 1374901 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 19:51:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:51:01,157 INFO L93 Difference]: Finished difference Result 1050714 states and 4955717 transitions. [2021-02-19 19:51:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 19:51:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 [2021-02-19 19:51:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:51:09,325 INFO L225 Difference]: With dead ends: 1050714 [2021-02-19 19:51:09,341 INFO L226 Difference]: Without dead ends: 1048522 [2021-02-19 19:51:09,342 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 19:51:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048522 states. [2021-02-19 19:51:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048522 to 706654. [2021-02-19 19:51:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706654 states, 706653 states have (on average 4.956557178700154) internal successors, (3502566), 706653 states have internal predecessors, (3502566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:51:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706654 states to 706654 states and 3502566 transitions. [2021-02-19 19:51:50,492 INFO L78 Accepts]: Start accepts. Automaton has 706654 states and 3502566 transitions. Word has length 35 [2021-02-19 19:51:50,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:51:50,492 INFO L480 AbstractCegarLoop]: Abstraction has 706654 states and 3502566 transitions. [2021-02-19 19:51:50,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 19:51:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 706654 states and 3502566 transitions. [2021-02-19 19:51:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:51:53,762 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:51:53,762 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:51:53,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 19:51:53,963 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:51:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:51:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1096456648, now seen corresponding path program 16 times [2021-02-19 19:51:53,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:51:53,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206730530] [2021-02-19 19:51:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:51:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:51:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:51:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206730530] [2021-02-19 19:51:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64725249] [2021-02-19 19:51:54,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:51:54,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:51:54,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:51:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:51:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:51:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:51:54,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:51:54,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-02-19 19:51:54,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508890399] [2021-02-19 19:51:54,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:51:54,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:51:54,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:51:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:51:54,143 INFO L87 Difference]: Start difference. First operand 706654 states and 3502566 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:52:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:52:11,254 INFO L93 Difference]: Finished difference Result 955483 states and 4512570 transitions. [2021-02-19 19:52:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:52:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:52:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:52:21,246 INFO L225 Difference]: With dead ends: 955483 [2021-02-19 19:52:21,247 INFO L226 Difference]: Without dead ends: 947993 [2021-02-19 19:52:21,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:52:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947993 states. [2021-02-19 19:52:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947993 to 704846. [2021-02-19 19:52:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704846 states, 704845 states have (on average 4.933249154069334) internal successors, (3477176), 704845 states have internal predecessors, (3477176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704846 states to 704846 states and 3477176 transitions. [2021-02-19 19:53:05,540 INFO L78 Accepts]: Start accepts. Automaton has 704846 states and 3477176 transitions. Word has length 35 [2021-02-19 19:53:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:05,540 INFO L480 AbstractCegarLoop]: Abstraction has 704846 states and 3477176 transitions. [2021-02-19 19:53:05,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,540 INFO L276 IsEmpty]: Start isEmpty. Operand 704846 states and 3477176 transitions. [2021-02-19 19:53:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:53:10,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:10,928 INFO L506 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] [2021-02-19 19:53:11,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 19:53:11,142 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1766912100, now seen corresponding path program 17 times [2021-02-19 19:53:11,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:11,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763139919] [2021-02-19 19:53:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 19:53:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763139919] [2021-02-19 19:53:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456169715] [2021-02-19 19:53:11,238 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:11,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:53:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:53:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:53:11,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:11,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 19:53:11,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296205095] [2021-02-19 19:53:11,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:53:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:53:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:53:11,425 INFO L87 Difference]: Start difference. First operand 704846 states and 3477176 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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)