/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/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:15:40,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:15:40,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:15:40,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:15:40,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:15:40,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:15:40,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:15:40,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:15:40,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:15:40,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:15:40,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:15:40,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-02-19 18:15:40,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:15:40,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:15:40,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:15:40,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:15:40,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:15:40,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:15:40,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:15:40,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:15:40,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:15:40,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:15:40,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:15:40,397 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 18:15:40,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:15:40,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:15:40,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:15:40,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:15:40,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:15:40,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:15:40,427 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:15:40,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:15:40,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:15:40,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:15:40,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:15:40,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:15:40,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:15:40,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:15:40,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:15:40,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:15:40,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:15:40,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:15:40,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:15:40,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:15:40,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:15:40,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:15:40,430 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:15:40,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:15:40,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:15:40,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:15:40,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:15:40,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:15:40,674 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:15:40,677 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:15:40,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2021-02-19 18:15:40,680 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2021-02-19 18:15:40,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:15:40,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:15:40,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:15:40,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:15:40,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:15:40,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:15:40,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:15:40,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:15:40,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:15:40,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/1) ... [2021-02-19 18:15:40,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:15:40,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:15:40,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:15:40,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:15:40,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (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 18:15:40,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:15:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:15:40,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:15:40,779 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:15:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:15:40,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:15:40,779 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:15:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:15:40,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:15:40,779 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:15:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:15:40,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:15:40,780 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 18:15:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 18:15:40,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 18:15:40,780 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-02-19 18:15:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-02-19 18:15:40,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-02-19 18:15:40,781 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 18:15:40,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:15:40,985 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:15:40,987 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:15:40 BoogieIcfgContainer [2021-02-19 18:15:40,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:15:40,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:15:40,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:15:40,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:15:40,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:15:40" (1/2) ... [2021-02-19 18:15:40,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e5a201 and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:15:40, skipping insertion in model container [2021-02-19 18:15:40,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:15:40" (2/2) ... [2021-02-19 18:15:40,992 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2021-02-19 18:15:40,995 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:15:40,995 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:15:41,008 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:15:41,009 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:15:41,096 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-02-19 18:15:41,111 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-02-19 18:15:41,123 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:15:41,124 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:15:41,124 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:15:41,124 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:15:41,124 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:15:41,124 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:15:41,124 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:15:41,124 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:15:41,135 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 42 transitions, 124 flow [2021-02-19 18:15:41,303 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 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 18:15:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 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 18:15:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:15:41,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:41,357 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 18:15:41,358 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1950383327, now seen corresponding path program 1 times [2021-02-19 18:15:41,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:41,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024717588] [2021-02-19 18:15:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:41,549 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 18:15:41,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024717588] [2021-02-19 18:15:41,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:41,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:15:41,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409821973] [2021-02-19 18:15:41,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:15:41,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:15:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:41,572 INFO L87 Difference]: Start difference. First operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:41,832 INFO L93 Difference]: Finished difference Result 13093 states and 60005 transitions. [2021-02-19 18:15:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:15:41,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:15:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:41,922 INFO L225 Difference]: With dead ends: 13093 [2021-02-19 18:15:41,922 INFO L226 Difference]: Without dead ends: 8907 [2021-02-19 18:15:41,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:15:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-02-19 18:15:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 3875. [2021-02-19 18:15:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.593959731543624) internal successors, (17797), 3874 states have internal predecessors, (17797), 0 states have call successors, (0), 0 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 18:15:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17797 transitions. [2021-02-19 18:15:42,210 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17797 transitions. Word has length 27 [2021-02-19 18:15:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:42,210 INFO L480 AbstractCegarLoop]: Abstraction has 3875 states and 17797 transitions. [2021-02-19 18:15:42,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17797 transitions. [2021-02-19 18:15:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:15:42,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:42,224 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 18:15:42,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:15:42,225 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -557112319, now seen corresponding path program 2 times [2021-02-19 18:15:42,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:42,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003360416] [2021-02-19 18:15:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:42,275 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 18:15:42,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003360416] [2021-02-19 18:15:42,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:42,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:42,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758471953] [2021-02-19 18:15:42,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:42,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:42,278 INFO L87 Difference]: Start difference. First operand 3875 states and 17797 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:42,362 INFO L93 Difference]: Finished difference Result 4814 states and 21965 transitions. [2021-02-19 18:15:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:15:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:42,397 INFO L225 Difference]: With dead ends: 4814 [2021-02-19 18:15:42,397 INFO L226 Difference]: Without dead ends: 3427 [2021-02-19 18:15:42,398 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-02-19 18:15:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2021-02-19 18:15:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.5128429655575015) internal successors, (15461), 3426 states have internal predecessors, (15461), 0 states have call successors, (0), 0 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 18:15:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 15461 transitions. [2021-02-19 18:15:42,501 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 15461 transitions. Word has length 27 [2021-02-19 18:15:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:42,503 INFO L480 AbstractCegarLoop]: Abstraction has 3427 states and 15461 transitions. [2021-02-19 18:15:42,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 15461 transitions. [2021-02-19 18:15:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:15:42,578 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:42,584 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 18:15:42,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:15:42,585 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1401759391, now seen corresponding path program 3 times [2021-02-19 18:15:42,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:42,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882763745] [2021-02-19 18:15:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:42,644 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 18:15:42,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882763745] [2021-02-19 18:15:42,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:42,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:15:42,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998903378] [2021-02-19 18:15:42,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:15:42,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:42,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:15:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:42,646 INFO L87 Difference]: Start difference. First operand 3427 states and 15461 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:42,885 INFO L93 Difference]: Finished difference Result 13141 states and 59505 transitions. [2021-02-19 18:15:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:15:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:15:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:42,931 INFO L225 Difference]: With dead ends: 13141 [2021-02-19 18:15:42,933 INFO L226 Difference]: Without dead ends: 9627 [2021-02-19 18:15:42,933 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:15:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-02-19 18:15:43,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 3610. [2021-02-19 18:15:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 4.5259074535882515) internal successors, (16334), 3609 states have internal predecessors, (16334), 0 states have call successors, (0), 0 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 18:15:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 16334 transitions. [2021-02-19 18:15:43,121 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 16334 transitions. Word has length 27 [2021-02-19 18:15:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:43,121 INFO L480 AbstractCegarLoop]: Abstraction has 3610 states and 16334 transitions. [2021-02-19 18:15:43,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 16334 transitions. [2021-02-19 18:15:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:15:43,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:43,130 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 18:15:43,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:15:43,130 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash -764998427, now seen corresponding path program 4 times [2021-02-19 18:15:43,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:43,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73346277] [2021-02-19 18:15:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:43,171 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 18:15:43,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73346277] [2021-02-19 18:15:43,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:43,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:43,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640138199] [2021-02-19 18:15:43,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:43,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:43,173 INFO L87 Difference]: Start difference. First operand 3610 states and 16334 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:43,201 INFO L93 Difference]: Finished difference Result 4293 states and 19350 transitions. [2021-02-19 18:15:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:15:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:43,212 INFO L225 Difference]: With dead ends: 4293 [2021-02-19 18:15:43,212 INFO L226 Difference]: Without dead ends: 3354 [2021-02-19 18:15:43,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-02-19 18:15:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3354. [2021-02-19 18:15:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 4.470623322397853) internal successors, (14990), 3353 states have internal predecessors, (14990), 0 states have call successors, (0), 0 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 18:15:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 14990 transitions. [2021-02-19 18:15:43,334 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 14990 transitions. Word has length 27 [2021-02-19 18:15:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:43,334 INFO L480 AbstractCegarLoop]: Abstraction has 3354 states and 14990 transitions. [2021-02-19 18:15:43,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 14990 transitions. [2021-02-19 18:15:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:43,342 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:43,342 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 18:15:43,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:15:43,342 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:43,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1224345507, now seen corresponding path program 1 times [2021-02-19 18:15:43,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:43,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145071867] [2021-02-19 18:15:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:43,374 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 18:15:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145071867] [2021-02-19 18:15:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996823766] [2021-02-19 18:15:43,375 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 18:15:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:15:43,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:43,573 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 18:15:43,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:43,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 18:15:43,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971493297] [2021-02-19 18:15:43,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:15:43,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:15:43,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:15:43,574 INFO L87 Difference]: Start difference. First operand 3354 states and 14990 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 18:15:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:43,659 INFO L93 Difference]: Finished difference Result 6670 states and 29656 transitions. [2021-02-19 18:15:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:15:43,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 18:15:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:43,679 INFO L225 Difference]: With dead ends: 6670 [2021-02-19 18:15:43,679 INFO L226 Difference]: Without dead ends: 6670 [2021-02-19 18:15:43,679 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:15:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2021-02-19 18:15:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4206. [2021-02-19 18:15:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 4.520332936979786) internal successors, (19008), 4205 states have internal predecessors, (19008), 0 states have call successors, (0), 0 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 18:15:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 19008 transitions. [2021-02-19 18:15:43,892 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 19008 transitions. Word has length 29 [2021-02-19 18:15:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:43,892 INFO L480 AbstractCegarLoop]: Abstraction has 4206 states and 19008 transitions. [2021-02-19 18:15:43,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 18:15:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 19008 transitions. [2021-02-19 18:15:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:43,903 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:43,903 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, 1, 1, 1, 1] [2021-02-19 18:15:44,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:44,118 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:44,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1937918305, now seen corresponding path program 1 times [2021-02-19 18:15:44,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:44,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710540487] [2021-02-19 18:15:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:44,188 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 18:15:44,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710540487] [2021-02-19 18:15:44,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412814641] [2021-02-19 18:15:44,188 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 18:15:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:15:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:44,289 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 18:15:44,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 18:15:44,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-02-19 18:15:44,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353328845] [2021-02-19 18:15:44,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:44,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:44,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:15:44,291 INFO L87 Difference]: Start difference. First operand 4206 states and 19008 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:44,355 INFO L93 Difference]: Finished difference Result 5618 states and 25299 transitions. [2021-02-19 18:15:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:44,377 INFO L225 Difference]: With dead ends: 5618 [2021-02-19 18:15:44,377 INFO L226 Difference]: Without dead ends: 5418 [2021-02-19 18:15:44,378 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:15:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-02-19 18:15:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4426. [2021-02-19 18:15:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 4.55864406779661) internal successors, (20172), 4425 states have internal predecessors, (20172), 0 states have call successors, (0), 0 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 18:15:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 20172 transitions. [2021-02-19 18:15:44,568 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 20172 transitions. Word has length 29 [2021-02-19 18:15:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:44,568 INFO L480 AbstractCegarLoop]: Abstraction has 4426 states and 20172 transitions. [2021-02-19 18:15:44,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 20172 transitions. [2021-02-19 18:15:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:44,580 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:44,580 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 18:15:44,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:44,783 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1044266843, now seen corresponding path program 1 times [2021-02-19 18:15:44,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:44,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201017098] [2021-02-19 18:15:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:44,806 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 18:15:44,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201017098] [2021-02-19 18:15:44,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:44,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:44,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427549515] [2021-02-19 18:15:44,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:44,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:44,807 INFO L87 Difference]: Start difference. First operand 4426 states and 20172 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:44,877 INFO L93 Difference]: Finished difference Result 7946 states and 35321 transitions. [2021-02-19 18:15:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:44,900 INFO L225 Difference]: With dead ends: 7946 [2021-02-19 18:15:44,900 INFO L226 Difference]: Without dead ends: 7848 [2021-02-19 18:15:44,900 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-02-19 18:15:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 6434. [2021-02-19 18:15:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 4.542048810819214) internal successors, (29219), 6433 states have internal predecessors, (29219), 0 states have call successors, (0), 0 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 18:15:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 29219 transitions. [2021-02-19 18:15:45,044 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 29219 transitions. Word has length 29 [2021-02-19 18:15:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:45,044 INFO L480 AbstractCegarLoop]: Abstraction has 6434 states and 29219 transitions. [2021-02-19 18:15:45,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 29219 transitions. [2021-02-19 18:15:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:45,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:45,123 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 18:15:45,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:15:45,123 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash 688299425, now seen corresponding path program 1 times [2021-02-19 18:15:45,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:45,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896285903] [2021-02-19 18:15:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:45,168 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 18:15:45,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896285903] [2021-02-19 18:15:45,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:45,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:45,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180034965] [2021-02-19 18:15:45,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:45,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:45,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:45,169 INFO L87 Difference]: Start difference. First operand 6434 states and 29219 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:45,249 INFO L93 Difference]: Finished difference Result 11319 states and 50308 transitions. [2021-02-19 18:15:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:45,277 INFO L225 Difference]: With dead ends: 11319 [2021-02-19 18:15:45,277 INFO L226 Difference]: Without dead ends: 11198 [2021-02-19 18:15:45,278 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2021-02-19 18:15:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 8925. [2021-02-19 18:15:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 4.6001792917974) internal successors, (41052), 8924 states have internal predecessors, (41052), 0 states have call successors, (0), 0 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 18:15:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 41052 transitions. [2021-02-19 18:15:45,604 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 41052 transitions. Word has length 29 [2021-02-19 18:15:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:45,604 INFO L480 AbstractCegarLoop]: Abstraction has 8925 states and 41052 transitions. [2021-02-19 18:15:45,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 41052 transitions. [2021-02-19 18:15:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:45,647 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:45,647 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 18:15:45,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:15:45,647 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1015475429, now seen corresponding path program 2 times [2021-02-19 18:15:45,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:45,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841499979] [2021-02-19 18:15:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:45,695 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 18:15:45,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841499979] [2021-02-19 18:15:45,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040368523] [2021-02-19 18:15:45,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:15:45,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:15:45,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:15:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:45,785 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 18:15:45,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:45,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-02-19 18:15:45,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125499656] [2021-02-19 18:15:45,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:15:45,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:45,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:15:45,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:15:45,787 INFO L87 Difference]: Start difference. First operand 8925 states and 41052 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:46,410 INFO L93 Difference]: Finished difference Result 31957 states and 138250 transitions. [2021-02-19 18:15:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:15:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:46,490 INFO L225 Difference]: With dead ends: 31957 [2021-02-19 18:15:46,490 INFO L226 Difference]: Without dead ends: 25190 [2021-02-19 18:15:46,490 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:15:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25190 states. [2021-02-19 18:15:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25190 to 11186. [2021-02-19 18:15:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11186 states, 11185 states have (on average 4.569959767545821) internal successors, (51115), 11185 states have internal predecessors, (51115), 0 states have call successors, (0), 0 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 18:15:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 51115 transitions. [2021-02-19 18:15:46,969 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 51115 transitions. Word has length 29 [2021-02-19 18:15:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:46,969 INFO L480 AbstractCegarLoop]: Abstraction has 11186 states and 51115 transitions. [2021-02-19 18:15:46,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 51115 transitions. [2021-02-19 18:15:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:46,992 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:46,992 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 18:15:47,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:47,206 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1739946531, now seen corresponding path program 2 times [2021-02-19 18:15:47,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:47,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576245837] [2021-02-19 18:15:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:47,222 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 18:15:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576245837] [2021-02-19 18:15:47,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:47,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:47,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917008113] [2021-02-19 18:15:47,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:47,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:47,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:47,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:47,224 INFO L87 Difference]: Start difference. First operand 11186 states and 51115 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:47,313 INFO L93 Difference]: Finished difference Result 13521 states and 60589 transitions. [2021-02-19 18:15:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:47,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:47,349 INFO L225 Difference]: With dead ends: 13521 [2021-02-19 18:15:47,349 INFO L226 Difference]: Without dead ends: 13281 [2021-02-19 18:15:47,349 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2021-02-19 18:15:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 11164. [2021-02-19 18:15:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11164 states, 11163 states have (on average 4.55361461972588) internal successors, (50832), 11163 states have internal predecessors, (50832), 0 states have call successors, (0), 0 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 18:15:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11164 states to 11164 states and 50832 transitions. [2021-02-19 18:15:47,700 INFO L78 Accepts]: Start accepts. Automaton has 11164 states and 50832 transitions. Word has length 29 [2021-02-19 18:15:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:47,700 INFO L480 AbstractCegarLoop]: Abstraction has 11164 states and 50832 transitions. [2021-02-19 18:15:47,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 11164 states and 50832 transitions. [2021-02-19 18:15:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:47,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:47,723 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 18:15:47,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:15:47,723 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1991629089, now seen corresponding path program 2 times [2021-02-19 18:15:47,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:47,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326438224] [2021-02-19 18:15:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:47,737 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 18:15:47,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326438224] [2021-02-19 18:15:47,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:47,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724534281] [2021-02-19 18:15:47,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:47,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:47,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:47,738 INFO L87 Difference]: Start difference. First operand 11164 states and 50832 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:47,808 INFO L93 Difference]: Finished difference Result 12568 states and 55860 transitions. [2021-02-19 18:15:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:15:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:47,837 INFO L225 Difference]: With dead ends: 12568 [2021-02-19 18:15:47,837 INFO L226 Difference]: Without dead ends: 12568 [2021-02-19 18:15:47,838 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12568 states. [2021-02-19 18:15:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12568 to 10980. [2021-02-19 18:15:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 4.559340559249477) internal successors, (50057), 10979 states have internal predecessors, (50057), 0 states have call successors, (0), 0 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 18:15:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 50057 transitions. [2021-02-19 18:15:48,178 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 50057 transitions. Word has length 29 [2021-02-19 18:15:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:48,178 INFO L480 AbstractCegarLoop]: Abstraction has 10980 states and 50057 transitions. [2021-02-19 18:15:48,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 50057 transitions. [2021-02-19 18:15:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:48,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:48,196 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 18:15:48,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 18:15:48,197 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash 899819551, now seen corresponding path program 3 times [2021-02-19 18:15:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:48,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951117188] [2021-02-19 18:15:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:48,212 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 18:15:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951117188] [2021-02-19 18:15:48,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:48,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:48,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877365571] [2021-02-19 18:15:48,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:48,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:48,213 INFO L87 Difference]: Start difference. First operand 10980 states and 50057 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:48,287 INFO L93 Difference]: Finished difference Result 13957 states and 62115 transitions. [2021-02-19 18:15:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:15:48,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:48,323 INFO L225 Difference]: With dead ends: 13957 [2021-02-19 18:15:48,323 INFO L226 Difference]: Without dead ends: 13957 [2021-02-19 18:15:48,323 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13957 states. [2021-02-19 18:15:48,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13957 to 11348. [2021-02-19 18:15:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11348 states, 11347 states have (on average 4.560324314796863) internal successors, (51746), 11347 states have internal predecessors, (51746), 0 states have call successors, (0), 0 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 18:15:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11348 states to 11348 states and 51746 transitions. [2021-02-19 18:15:48,690 INFO L78 Accepts]: Start accepts. Automaton has 11348 states and 51746 transitions. Word has length 29 [2021-02-19 18:15:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:48,690 INFO L480 AbstractCegarLoop]: Abstraction has 11348 states and 51746 transitions. [2021-02-19 18:15:48,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 11348 states and 51746 transitions. [2021-02-19 18:15:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:48,710 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:48,710 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 18:15:48,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 18:15:48,710 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1285584509, now seen corresponding path program 4 times [2021-02-19 18:15:48,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:48,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831321454] [2021-02-19 18:15:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:48,730 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 18:15:48,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831321454] [2021-02-19 18:15:48,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:48,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:15:48,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755870748] [2021-02-19 18:15:48,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:15:48,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:48,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:15:48,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:48,731 INFO L87 Difference]: Start difference. First operand 11348 states and 51746 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:48,830 INFO L93 Difference]: Finished difference Result 15992 states and 69373 transitions. [2021-02-19 18:15:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:48,870 INFO L225 Difference]: With dead ends: 15992 [2021-02-19 18:15:48,870 INFO L226 Difference]: Without dead ends: 15751 [2021-02-19 18:15:48,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2021-02-19 18:15:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 11284. [2021-02-19 18:15:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 11283 states have (on average 4.5284055658955955) internal successors, (51094), 11283 states have internal predecessors, (51094), 0 states have call successors, (0), 0 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 18:15:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 51094 transitions. [2021-02-19 18:15:49,243 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 51094 transitions. Word has length 29 [2021-02-19 18:15:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:49,243 INFO L480 AbstractCegarLoop]: Abstraction has 11284 states and 51094 transitions. [2021-02-19 18:15:49,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 51094 transitions. [2021-02-19 18:15:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:49,263 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:49,263 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 18:15:49,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 18:15:49,263 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1917848499, now seen corresponding path program 2 times [2021-02-19 18:15:49,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:49,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015505785] [2021-02-19 18:15:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:49,280 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 18:15:49,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015505785] [2021-02-19 18:15:49,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:49,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:15:49,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698338286] [2021-02-19 18:15:49,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:15:49,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:49,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:15:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:15:49,281 INFO L87 Difference]: Start difference. First operand 11284 states and 51094 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:49,358 INFO L93 Difference]: Finished difference Result 12615 states and 55305 transitions. [2021-02-19 18:15:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:49,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:49,386 INFO L225 Difference]: With dead ends: 12615 [2021-02-19 18:15:49,386 INFO L226 Difference]: Without dead ends: 12260 [2021-02-19 18:15:49,387 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12260 states. [2021-02-19 18:15:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12260 to 10888. [2021-02-19 18:15:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10888 states, 10887 states have (on average 4.4892073114723985) internal successors, (48874), 10887 states have internal predecessors, (48874), 0 states have call successors, (0), 0 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 18:15:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10888 states to 10888 states and 48874 transitions. [2021-02-19 18:15:49,586 INFO L78 Accepts]: Start accepts. Automaton has 10888 states and 48874 transitions. Word has length 29 [2021-02-19 18:15:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:49,587 INFO L480 AbstractCegarLoop]: Abstraction has 10888 states and 48874 transitions. [2021-02-19 18:15:49,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10888 states and 48874 transitions. [2021-02-19 18:15:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:49,606 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:49,606 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 18:15:49,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-19 18:15:49,606 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:49,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash -29093179, now seen corresponding path program 3 times [2021-02-19 18:15:49,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:49,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997996409] [2021-02-19 18:15:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:49,661 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 18:15:49,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997996409] [2021-02-19 18:15:49,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901807424] [2021-02-19 18:15:49,661 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 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 18:15:49,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:15:49,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:49,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:15:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:49,896 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 18:15:49,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:49,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-02-19 18:15:49,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224457022] [2021-02-19 18:15:49,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:15:49,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:15:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:15:49,899 INFO L87 Difference]: Start difference. First operand 10888 states and 48874 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:50,714 INFO L93 Difference]: Finished difference Result 30302 states and 134994 transitions. [2021-02-19 18:15:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:15:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:50,747 INFO L225 Difference]: With dead ends: 30302 [2021-02-19 18:15:50,747 INFO L226 Difference]: Without dead ends: 13198 [2021-02-19 18:15:50,748 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:15:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2021-02-19 18:15:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 5975. [2021-02-19 18:15:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5974 states have (on average 4.401238701037831) internal successors, (26293), 5974 states have internal predecessors, (26293), 0 states have call successors, (0), 0 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 18:15:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 26293 transitions. [2021-02-19 18:15:51,008 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 26293 transitions. Word has length 29 [2021-02-19 18:15:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:51,008 INFO L480 AbstractCegarLoop]: Abstraction has 5975 states and 26293 transitions. [2021-02-19 18:15:51,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 26293 transitions. [2021-02-19 18:15:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:15:51,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:51,018 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 18:15:51,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:51,234 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1398155, now seen corresponding path program 3 times [2021-02-19 18:15:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:51,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644880035] [2021-02-19 18:15:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:51,260 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 18:15:51,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644880035] [2021-02-19 18:15:51,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:15:51,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:15:51,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352169951] [2021-02-19 18:15:51,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:15:51,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:15:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:15:51,261 INFO L87 Difference]: Start difference. First operand 5975 states and 26293 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:51,319 INFO L93 Difference]: Finished difference Result 5787 states and 25561 transitions. [2021-02-19 18:15:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:15:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:15:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:51,331 INFO L225 Difference]: With dead ends: 5787 [2021-02-19 18:15:51,331 INFO L226 Difference]: Without dead ends: 5413 [2021-02-19 18:15:51,331 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:15:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-02-19 18:15:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 5159. [2021-02-19 18:15:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 4.498255137650252) internal successors, (23202), 5158 states have internal predecessors, (23202), 0 states have call successors, (0), 0 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 18:15:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 23202 transitions. [2021-02-19 18:15:51,410 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 23202 transitions. Word has length 29 [2021-02-19 18:15:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:51,410 INFO L480 AbstractCegarLoop]: Abstraction has 5159 states and 23202 transitions. [2021-02-19 18:15:51,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 23202 transitions. [2021-02-19 18:15:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:15:51,419 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:51,419 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, 1, 1, 1, 1] [2021-02-19 18:15:51,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-19 18:15:51,419 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1451879969, now seen corresponding path program 1 times [2021-02-19 18:15:51,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:51,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741561481] [2021-02-19 18:15:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:15:51,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741561481] [2021-02-19 18:15:51,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782655924] [2021-02-19 18:15:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:15:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:15:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:15:51,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:51,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 10 [2021-02-19 18:15:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395318061] [2021-02-19 18:15:51,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:15:51,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:15:51,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:15:51,604 INFO L87 Difference]: Start difference. First operand 5159 states and 23202 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:52,425 INFO L93 Difference]: Finished difference Result 18525 states and 84293 transitions. [2021-02-19 18:15:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:15:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:15:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:52,455 INFO L225 Difference]: With dead ends: 18525 [2021-02-19 18:15:52,455 INFO L226 Difference]: Without dead ends: 11569 [2021-02-19 18:15:52,456 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:15:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2021-02-19 18:15:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 6899. [2021-02-19 18:15:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6898 states have (on average 4.447521020585677) internal successors, (30679), 6898 states have internal predecessors, (30679), 0 states have call successors, (0), 0 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 18:15:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30679 transitions. [2021-02-19 18:15:52,625 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30679 transitions. Word has length 33 [2021-02-19 18:15:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:52,626 INFO L480 AbstractCegarLoop]: Abstraction has 6899 states and 30679 transitions. [2021-02-19 18:15:52,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30679 transitions. [2021-02-19 18:15:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:15:52,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:52,638 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:15:52,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:15:52,838 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2012321527, now seen corresponding path program 1 times [2021-02-19 18:15:52,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:52,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939653104] [2021-02-19 18:15:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:52,898 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 18:15:52,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939653104] [2021-02-19 18:15:52,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281731022] [2021-02-19 18:15:52,898 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 18:15:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:52,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:15:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:53,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-02-19 18:15:53,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:53,066 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 18:15:53,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 10 [2021-02-19 18:15:53,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:53,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:53,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:53,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-02-19 18:15:53,102 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 18:15:53,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:53,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 18:15:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335975838] [2021-02-19 18:15:53,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:15:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:15:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:15:53,104 INFO L87 Difference]: Start difference. First operand 6899 states and 30679 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:53,443 INFO L93 Difference]: Finished difference Result 27517 states and 125122 transitions. [2021-02-19 18:15:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:15:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:15:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:53,477 INFO L225 Difference]: With dead ends: 27517 [2021-02-19 18:15:53,477 INFO L226 Difference]: Without dead ends: 12500 [2021-02-19 18:15:53,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:15:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12500 states. [2021-02-19 18:15:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12500 to 6192. [2021-02-19 18:15:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 6191 states have (on average 4.44580843159425) internal successors, (27524), 6191 states have internal predecessors, (27524), 0 states have call successors, (0), 0 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 18:15:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 27524 transitions. [2021-02-19 18:15:53,640 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 27524 transitions. Word has length 35 [2021-02-19 18:15:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:53,640 INFO L480 AbstractCegarLoop]: Abstraction has 6192 states and 27524 transitions. [2021-02-19 18:15:53,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 27524 transitions. [2021-02-19 18:15:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:15:53,651 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:53,651 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:15:53,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:15:53,851 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 731191235, now seen corresponding path program 2 times [2021-02-19 18:15:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:53,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761542557] [2021-02-19 18:15:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:15:53,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761542557] [2021-02-19 18:15:53,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51315911] [2021-02-19 18:15:53,987 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 18:15:54,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:15:54,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:54,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:15:54,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-02-19 18:15:54,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:54,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 18:15:54,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-02-19 18:15:54,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:54,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-02-19 18:15:54,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:15:54,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:54,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 18:15:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:15:54,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:54,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 18:15:54,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407760947] [2021-02-19 18:15:54,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:15:54,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:15:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:15:54,170 INFO L87 Difference]: Start difference. First operand 6192 states and 27524 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:54,421 INFO L93 Difference]: Finished difference Result 10634 states and 48001 transitions. [2021-02-19 18:15:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:15:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:15:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:54,437 INFO L225 Difference]: With dead ends: 10634 [2021-02-19 18:15:54,437 INFO L226 Difference]: Without dead ends: 6474 [2021-02-19 18:15:54,438 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:15:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2021-02-19 18:15:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 6363. [2021-02-19 18:15:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6363 states, 6362 states have (on average 4.419993712668972) internal successors, (28120), 6362 states have internal predecessors, (28120), 0 states have call successors, (0), 0 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 18:15:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6363 states to 6363 states and 28120 transitions. [2021-02-19 18:15:54,560 INFO L78 Accepts]: Start accepts. Automaton has 6363 states and 28120 transitions. Word has length 35 [2021-02-19 18:15:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:54,560 INFO L480 AbstractCegarLoop]: Abstraction has 6363 states and 28120 transitions. [2021-02-19 18:15:54,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6363 states and 28120 transitions. [2021-02-19 18:15:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:15:54,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:54,572 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:15:54,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:54,772 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash 629651977, now seen corresponding path program 3 times [2021-02-19 18:15:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:54,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196132762] [2021-02-19 18:15:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:15:54,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196132762] [2021-02-19 18:15:54,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845465681] [2021-02-19 18:15:54,901 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 18:15:54,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:15:54,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:54,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:15:54,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:54,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-02-19 18:15:54,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:54,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:54,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 18:15:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2021-02-19 18:15:55,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:55,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:55,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:55,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:16 [2021-02-19 18:15:55,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:15:55,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:55,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:55,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:55,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 18:15:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:15:55,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:55,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 18:15:55,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379470142] [2021-02-19 18:15:55,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:15:55,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:55,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:15:55,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:15:55,083 INFO L87 Difference]: Start difference. First operand 6363 states and 28120 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:55,468 INFO L93 Difference]: Finished difference Result 12860 states and 57584 transitions. [2021-02-19 18:15:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:15:55,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:15:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:55,491 INFO L225 Difference]: With dead ends: 12860 [2021-02-19 18:15:55,492 INFO L226 Difference]: Without dead ends: 8967 [2021-02-19 18:15:55,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:15:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2021-02-19 18:15:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 7211. [2021-02-19 18:15:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7210 states have (on average 4.395561719833564) internal successors, (31692), 7210 states have internal predecessors, (31692), 0 states have call successors, (0), 0 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 18:15:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 31692 transitions. [2021-02-19 18:15:55,643 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 31692 transitions. Word has length 35 [2021-02-19 18:15:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:55,643 INFO L480 AbstractCegarLoop]: Abstraction has 7211 states and 31692 transitions. [2021-02-19 18:15:55,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 31692 transitions. [2021-02-19 18:15:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:15:55,655 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:55,655 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:15:55,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:15:55,855 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:55,856 INFO L82 PathProgramCache]: Analyzing trace with hash 234216411, now seen corresponding path program 4 times [2021-02-19 18:15:55,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:55,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019244658] [2021-02-19 18:15:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:15:55,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019244658] [2021-02-19 18:15:55,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329558966] [2021-02-19 18:15:55,943 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 18:15:55,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:15:55,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:15:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:56,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-02-19 18:15:56,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:56,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:56,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:56,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-02-19 18:15:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 18:15:56,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:15:56,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:15:56,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:15:56,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 18:15:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:15:56,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:56,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 18:15:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478733132] [2021-02-19 18:15:56,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:15:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:15:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:15:56,076 INFO L87 Difference]: Start difference. First operand 7211 states and 31692 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:56,289 INFO L93 Difference]: Finished difference Result 19178 states and 86353 transitions. [2021-02-19 18:15:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:15:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:15:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:56,315 INFO L225 Difference]: With dead ends: 19178 [2021-02-19 18:15:56,316 INFO L226 Difference]: Without dead ends: 10498 [2021-02-19 18:15:56,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:15:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10498 states. [2021-02-19 18:15:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10498 to 6359. [2021-02-19 18:15:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6359 states, 6358 states have (on average 4.420887071406103) internal successors, (28108), 6358 states have internal predecessors, (28108), 0 states have call successors, (0), 0 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 18:15:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6359 states to 6359 states and 28108 transitions. [2021-02-19 18:15:56,465 INFO L78 Accepts]: Start accepts. Automaton has 6359 states and 28108 transitions. Word has length 35 [2021-02-19 18:15:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:56,465 INFO L480 AbstractCegarLoop]: Abstraction has 6359 states and 28108 transitions. [2021-02-19 18:15:56,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6359 states and 28108 transitions. [2021-02-19 18:15:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:15:56,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:56,476 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:15:56,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:56,678 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:56,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1502092755, now seen corresponding path program 5 times [2021-02-19 18:15:56,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:56,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689375905] [2021-02-19 18:15:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:56,711 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 18:15:56,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689375905] [2021-02-19 18:15:56,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467856483] [2021-02-19 18:15:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:15:56,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:15:56,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:15:56,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:15:56,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:56,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:15:56,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220220313] [2021-02-19 18:15:56,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:15:56,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:56,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:15:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:15:56,824 INFO L87 Difference]: Start difference. First operand 6359 states and 28108 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 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 18:15:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:57,307 INFO L93 Difference]: Finished difference Result 18635 states and 84267 transitions. [2021-02-19 18:15:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:15:57,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 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 37 [2021-02-19 18:15:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:57,355 INFO L225 Difference]: With dead ends: 18635 [2021-02-19 18:15:57,355 INFO L226 Difference]: Without dead ends: 18546 [2021-02-19 18:15:57,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:15:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18546 states. [2021-02-19 18:15:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18546 to 12258. [2021-02-19 18:15:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12258 states, 12257 states have (on average 4.625846455086889) internal successors, (56699), 12257 states have internal predecessors, (56699), 0 states have call successors, (0), 0 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 18:15:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12258 states to 12258 states and 56699 transitions. [2021-02-19 18:15:57,630 INFO L78 Accepts]: Start accepts. Automaton has 12258 states and 56699 transitions. Word has length 37 [2021-02-19 18:15:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:57,631 INFO L480 AbstractCegarLoop]: Abstraction has 12258 states and 56699 transitions. [2021-02-19 18:15:57,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 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 18:15:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 12258 states and 56699 transitions. [2021-02-19 18:15:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:15:57,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:57,653 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:15:57,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 18:15:57,854 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:57,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1162240123, now seen corresponding path program 6 times [2021-02-19 18:15:57,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:57,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434747131] [2021-02-19 18:15:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:57,882 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 18:15:57,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434747131] [2021-02-19 18:15:57,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220204010] [2021-02-19 18:15:57,883 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 18:15:57,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:15:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:15:57,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:57,970 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 18:15:57,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:57,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:15:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554322411] [2021-02-19 18:15:57,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:15:57,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:15:57,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:15:57,971 INFO L87 Difference]: Start difference. First operand 12258 states and 56699 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:58,170 INFO L93 Difference]: Finished difference Result 27860 states and 130336 transitions. [2021-02-19 18:15:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:15:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:15:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:58,248 INFO L225 Difference]: With dead ends: 27860 [2021-02-19 18:15:58,248 INFO L226 Difference]: Without dead ends: 27768 [2021-02-19 18:15:58,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:15:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27768 states. [2021-02-19 18:15:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27768 to 19795. [2021-02-19 18:15:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19795 states, 19794 states have (on average 4.833535414772153) internal successors, (95675), 19794 states have internal predecessors, (95675), 0 states have call successors, (0), 0 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 18:15:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19795 states to 19795 states and 95675 transitions. [2021-02-19 18:15:58,766 INFO L78 Accepts]: Start accepts. Automaton has 19795 states and 95675 transitions. Word has length 37 [2021-02-19 18:15:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:58,766 INFO L480 AbstractCegarLoop]: Abstraction has 19795 states and 95675 transitions. [2021-02-19 18:15:58,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19795 states and 95675 transitions. [2021-02-19 18:15:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:15:58,805 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:58,805 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:15:59,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:15:59,005 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:15:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:59,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1880336513, now seen corresponding path program 7 times [2021-02-19 18:15:59,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:59,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453487778] [2021-02-19 18:15:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:59,049 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 18:15:59,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453487778] [2021-02-19 18:15:59,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011328281] [2021-02-19 18:15:59,049 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 18:15:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:15:59,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:59,129 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 18:15:59,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:59,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:15:59,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479582004] [2021-02-19 18:15:59,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:15:59,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:59,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:15:59,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:15:59,130 INFO L87 Difference]: Start difference. First operand 19795 states and 95675 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:59,436 INFO L93 Difference]: Finished difference Result 43383 states and 210843 transitions. [2021-02-19 18:15:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:15:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:15:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:59,573 INFO L225 Difference]: With dead ends: 43383 [2021-02-19 18:15:59,573 INFO L226 Difference]: Without dead ends: 43231 [2021-02-19 18:15:59,573 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:15:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43231 states. [2021-02-19 18:16:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43231 to 30767. [2021-02-19 18:16:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30767 states, 30766 states have (on average 5.091269583306247) internal successors, (156638), 30766 states have internal predecessors, (156638), 0 states have call successors, (0), 0 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 18:16:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30767 states to 30767 states and 156638 transitions. [2021-02-19 18:16:00,492 INFO L78 Accepts]: Start accepts. Automaton has 30767 states and 156638 transitions. Word has length 37 [2021-02-19 18:16:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:00,492 INFO L480 AbstractCegarLoop]: Abstraction has 30767 states and 156638 transitions. [2021-02-19 18:16:00,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 30767 states and 156638 transitions. [2021-02-19 18:16:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:16:00,559 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:00,559 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:00,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 18:16:00,760 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1951088767, now seen corresponding path program 8 times [2021-02-19 18:16:00,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:00,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833741632] [2021-02-19 18:16:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:00,796 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 18:16:00,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833741632] [2021-02-19 18:16:00,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125691654] [2021-02-19 18:16:00,796 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 18:16:00,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:16:00,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:16:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:00,903 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 18:16:00,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:00,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-02-19 18:16:00,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067982152] [2021-02-19 18:16:00,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:16:00,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:16:00,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:16:00,904 INFO L87 Difference]: Start difference. First operand 30767 states and 156638 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:01,760 INFO L93 Difference]: Finished difference Result 69274 states and 323637 transitions. [2021-02-19 18:16:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:16:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:16:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:02,003 INFO L225 Difference]: With dead ends: 69274 [2021-02-19 18:16:02,004 INFO L226 Difference]: Without dead ends: 67888 [2021-02-19 18:16:02,004 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:16:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67888 states. [2021-02-19 18:16:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67888 to 31261. [2021-02-19 18:16:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31261 states, 31260 states have (on average 5.035796545105566) internal successors, (157419), 31260 states have internal predecessors, (157419), 0 states have call successors, (0), 0 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 18:16:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31261 states to 31261 states and 157419 transitions. [2021-02-19 18:16:03,154 INFO L78 Accepts]: Start accepts. Automaton has 31261 states and 157419 transitions. Word has length 37 [2021-02-19 18:16:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:03,154 INFO L480 AbstractCegarLoop]: Abstraction has 31261 states and 157419 transitions. [2021-02-19 18:16:03,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 31261 states and 157419 transitions. [2021-02-19 18:16:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:16:03,222 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:03,222 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:03,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:16:03,430 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash 519421501, now seen corresponding path program 9 times [2021-02-19 18:16:03,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:03,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226968414] [2021-02-19 18:16:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:16:03,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226968414] [2021-02-19 18:16:03,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205300463] [2021-02-19 18:16:03,468 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 18:16:03,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:16:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:03,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:16:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:03,565 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 18:16:03,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:03,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-02-19 18:16:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382127081] [2021-02-19 18:16:03,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:16:03,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:16:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:16:03,567 INFO L87 Difference]: Start difference. First operand 31261 states and 157419 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 18:16:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:04,119 INFO L93 Difference]: Finished difference Result 66258 states and 323771 transitions. [2021-02-19 18:16:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:16:04,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 37 [2021-02-19 18:16:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:04,352 INFO L225 Difference]: With dead ends: 66258 [2021-02-19 18:16:04,353 INFO L226 Difference]: Without dead ends: 66176 [2021-02-19 18:16:04,353 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:16:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66176 states. [2021-02-19 18:16:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66176 to 40198. [2021-02-19 18:16:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40198 states, 40197 states have (on average 5.167524939672115) internal successors, (207719), 40197 states have internal predecessors, (207719), 0 states have call successors, (0), 0 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 18:16:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40198 states to 40198 states and 207719 transitions. [2021-02-19 18:16:05,733 INFO L78 Accepts]: Start accepts. Automaton has 40198 states and 207719 transitions. Word has length 37 [2021-02-19 18:16:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:05,733 INFO L480 AbstractCegarLoop]: Abstraction has 40198 states and 207719 transitions. [2021-02-19 18:16:05,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 18:16:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40198 states and 207719 transitions. [2021-02-19 18:16:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:16:05,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:05,822 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:06,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:16:06,023 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash -447122247, now seen corresponding path program 10 times [2021-02-19 18:16:06,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:06,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699277845] [2021-02-19 18:16:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:06,057 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 18:16:06,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699277845] [2021-02-19 18:16:06,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868433214] [2021-02-19 18:16:06,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:16:06,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:16:06,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:06,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:16:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:06,455 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 18:16:06,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:06,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-02-19 18:16:06,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413803850] [2021-02-19 18:16:06,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:16:06,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:06,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:16:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:16:06,456 INFO L87 Difference]: Start difference. First operand 40198 states and 207719 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 18:16:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:07,062 INFO L93 Difference]: Finished difference Result 70325 states and 353603 transitions. [2021-02-19 18:16:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:16:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2021-02-19 18:16:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:07,299 INFO L225 Difference]: With dead ends: 70325 [2021-02-19 18:16:07,299 INFO L226 Difference]: Without dead ends: 69758 [2021-02-19 18:16:07,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:16:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69758 states. [2021-02-19 18:16:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69758 to 51764. [2021-02-19 18:16:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51764 states, 51763 states have (on average 5.266599694762668) internal successors, (272615), 51763 states have internal predecessors, (272615), 0 states have call successors, (0), 0 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 18:16:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51764 states to 51764 states and 272615 transitions. [2021-02-19 18:16:08,882 INFO L78 Accepts]: Start accepts. Automaton has 51764 states and 272615 transitions. Word has length 37 [2021-02-19 18:16:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:08,883 INFO L480 AbstractCegarLoop]: Abstraction has 51764 states and 272615 transitions. [2021-02-19 18:16:08,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 18:16:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 51764 states and 272615 transitions. [2021-02-19 18:16:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:16:09,007 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:09,007 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:09,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:16:09,208 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -892066227, now seen corresponding path program 11 times [2021-02-19 18:16:09,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:09,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322255140] [2021-02-19 18:16:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:09,239 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 18:16:09,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322255140] [2021-02-19 18:16:09,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442015156] [2021-02-19 18:16:09,239 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 18:16:09,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:16:09,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:16:09,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:09,627 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 18:16:09,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:09,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-02-19 18:16:09,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438465518] [2021-02-19 18:16:09,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:16:09,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:16:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:16:09,628 INFO L87 Difference]: Start difference. First operand 51764 states and 272615 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 18:16:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:10,100 INFO L93 Difference]: Finished difference Result 64190 states and 325508 transitions. [2021-02-19 18:16:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:16:10,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2021-02-19 18:16:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:10,320 INFO L225 Difference]: With dead ends: 64190 [2021-02-19 18:16:10,320 INFO L226 Difference]: Without dead ends: 64146 [2021-02-19 18:16:10,320 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:16:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64146 states. [2021-02-19 18:16:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64146 to 51069. [2021-02-19 18:16:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51069 states, 51068 states have (on average 5.260867862457899) internal successors, (268662), 51068 states have internal predecessors, (268662), 0 states have call successors, (0), 0 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 18:16:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51069 states to 51069 states and 268662 transitions. [2021-02-19 18:16:12,103 INFO L78 Accepts]: Start accepts. Automaton has 51069 states and 268662 transitions. Word has length 37 [2021-02-19 18:16:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:12,103 INFO L480 AbstractCegarLoop]: Abstraction has 51069 states and 268662 transitions. [2021-02-19 18:16:12,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 18:16:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 51069 states and 268662 transitions. [2021-02-19 18:16:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:16:12,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:12,237 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:12,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:16:12,442 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash -956772611, now seen corresponding path program 12 times [2021-02-19 18:16:12,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:12,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068993652] [2021-02-19 18:16:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:12,768 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 18:16:12,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068993652] [2021-02-19 18:16:12,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787341414] [2021-02-19 18:16:12,769 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 18:16:12,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:16:12,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:16:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:16:12,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:12,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-02-19 18:16:12,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225002283] [2021-02-19 18:16:12,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:16:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:16:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:16:12,932 INFO L87 Difference]: Start difference. First operand 51069 states and 268662 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:14,077 INFO L93 Difference]: Finished difference Result 87316 states and 431385 transitions. [2021-02-19 18:16:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:16:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:16:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:14,379 INFO L225 Difference]: With dead ends: 87316 [2021-02-19 18:16:14,379 INFO L226 Difference]: Without dead ends: 84262 [2021-02-19 18:16:14,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:16:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84262 states. [2021-02-19 18:16:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84262 to 53603. [2021-02-19 18:16:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53603 states, 53602 states have (on average 5.2537591880899965) internal successors, (281612), 53602 states have internal predecessors, (281612), 0 states have call successors, (0), 0 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 18:16:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53603 states to 53603 states and 281612 transitions. [2021-02-19 18:16:16,266 INFO L78 Accepts]: Start accepts. Automaton has 53603 states and 281612 transitions. Word has length 37 [2021-02-19 18:16:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:16,266 INFO L480 AbstractCegarLoop]: Abstraction has 53603 states and 281612 transitions. [2021-02-19 18:16:16,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 53603 states and 281612 transitions. [2021-02-19 18:16:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:16:16,391 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:16,391 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:16,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:16:16,592 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:16,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1424961333, now seen corresponding path program 13 times [2021-02-19 18:16:16,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:16,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626915502] [2021-02-19 18:16:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:16:16,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626915502] [2021-02-19 18:16:16,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207631851] [2021-02-19 18:16:16,614 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 18:16:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:16:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:16:16,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:16,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:16:16,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799948352] [2021-02-19 18:16:16,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:16:16,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:16,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:16:16,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:16:16,695 INFO L87 Difference]: Start difference. First operand 53603 states and 281612 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:17,619 INFO L93 Difference]: Finished difference Result 105889 states and 557176 transitions. [2021-02-19 18:16:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:16:17,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:16:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:18,037 INFO L225 Difference]: With dead ends: 105889 [2021-02-19 18:16:18,037 INFO L226 Difference]: Without dead ends: 105889 [2021-02-19 18:16:18,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:16:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105889 states. [2021-02-19 18:16:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105889 to 59652. [2021-02-19 18:16:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59652 states, 59651 states have (on average 5.368141355551457) internal successors, (320215), 59651 states have internal predecessors, (320215), 0 states have call successors, (0), 0 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 18:16:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59652 states to 59652 states and 320215 transitions. [2021-02-19 18:16:20,688 INFO L78 Accepts]: Start accepts. Automaton has 59652 states and 320215 transitions. Word has length 39 [2021-02-19 18:16:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:20,688 INFO L480 AbstractCegarLoop]: Abstraction has 59652 states and 320215 transitions. [2021-02-19 18:16:20,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 59652 states and 320215 transitions. [2021-02-19 18:16:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:16:20,848 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:20,848 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:21,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 18:16:21,049 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash 176582131, now seen corresponding path program 14 times [2021-02-19 18:16:21,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:21,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736515496] [2021-02-19 18:16:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:16:21,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736515496] [2021-02-19 18:16:21,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346405307] [2021-02-19 18:16:21,070 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 18:16:21,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:16:21,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:21,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:16:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:16:21,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:21,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:16:21,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131800664] [2021-02-19 18:16:21,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:16:21,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:21,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:16:21,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:16:21,170 INFO L87 Difference]: Start difference. First operand 59652 states and 320215 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:23,407 INFO L93 Difference]: Finished difference Result 178496 states and 911397 transitions. [2021-02-19 18:16:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:16:23,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:16:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:24,197 INFO L225 Difference]: With dead ends: 178496 [2021-02-19 18:16:24,197 INFO L226 Difference]: Without dead ends: 171313 [2021-02-19 18:16:24,198 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:16:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171313 states. [2021-02-19 18:16:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171313 to 96109. [2021-02-19 18:16:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96109 states, 96108 states have (on average 5.335788904149498) internal successors, (512812), 96108 states have internal predecessors, (512812), 0 states have call successors, (0), 0 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 18:16:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96109 states to 96109 states and 512812 transitions. [2021-02-19 18:16:28,134 INFO L78 Accepts]: Start accepts. Automaton has 96109 states and 512812 transitions. Word has length 39 [2021-02-19 18:16:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:28,134 INFO L480 AbstractCegarLoop]: Abstraction has 96109 states and 512812 transitions. [2021-02-19 18:16:28,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 96109 states and 512812 transitions. [2021-02-19 18:16:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:16:28,399 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:28,399 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:28,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:16:28,602 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1870380363, now seen corresponding path program 15 times [2021-02-19 18:16:28,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:28,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436667681] [2021-02-19 18:16:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:16:28,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436667681] [2021-02-19 18:16:28,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302515046] [2021-02-19 18:16:28,626 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 18:16:28,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:16:28,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:28,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:16:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:16:28,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:28,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:16:28,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099573369] [2021-02-19 18:16:28,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:16:28,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:16:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:16:28,715 INFO L87 Difference]: Start difference. First operand 96109 states and 512812 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:31,677 INFO L93 Difference]: Finished difference Result 263842 states and 1416988 transitions. [2021-02-19 18:16:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:16:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:16:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:33,365 INFO L225 Difference]: With dead ends: 263842 [2021-02-19 18:16:33,365 INFO L226 Difference]: Without dead ends: 247416 [2021-02-19 18:16:33,365 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:16:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247416 states. [2021-02-19 18:16:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247416 to 202278. [2021-02-19 18:16:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202278 states, 202277 states have (on average 5.489768980160869) internal successors, (1110454), 202277 states have internal predecessors, (1110454), 0 states have call successors, (0), 0 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 18:16:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202278 states to 202278 states and 1110454 transitions. [2021-02-19 18:16:40,897 INFO L78 Accepts]: Start accepts. Automaton has 202278 states and 1110454 transitions. Word has length 39 [2021-02-19 18:16:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:40,898 INFO L480 AbstractCegarLoop]: Abstraction has 202278 states and 1110454 transitions. [2021-02-19 18:16:40,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 202278 states and 1110454 transitions. [2021-02-19 18:16:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:16:42,050 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:42,050 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:16:42,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:16:42,258 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:16:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:42,258 INFO L82 PathProgramCache]: Analyzing trace with hash 729633923, now seen corresponding path program 16 times [2021-02-19 18:16:42,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:42,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845010840] [2021-02-19 18:16:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:42,283 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 18:16:42,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845010840] [2021-02-19 18:16:42,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271715629] [2021-02-19 18:16:42,283 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 18:16:42,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:16:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:16:42,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:16:42,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:42,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:16:42,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502223632] [2021-02-19 18:16:42,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:16:42,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:16:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:16:42,369 INFO L87 Difference]: Start difference. First operand 202278 states and 1110454 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:45,810 INFO L93 Difference]: Finished difference Result 349183 states and 1879738 transitions. [2021-02-19 18:16:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:16:45,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:16:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:48,054 INFO L225 Difference]: With dead ends: 349183 [2021-02-19 18:16:48,054 INFO L226 Difference]: Without dead ends: 344488 [2021-02-19 18:16:48,055 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:16:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344488 states. [2021-02-19 18:16:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344488 to 273543. [2021-02-19 18:16:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273543 states, 273542 states have (on average 5.523290756081333) internal successors, (1510852), 273542 states have internal predecessors, (1510852), 0 states have call successors, (0), 0 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 18:16:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273543 states to 273543 states and 1510852 transitions. [2021-02-19 18:16:59,505 INFO L78 Accepts]: Start accepts. Automaton has 273543 states and 1510852 transitions. Word has length 39 [2021-02-19 18:16:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:59,506 INFO L480 AbstractCegarLoop]: Abstraction has 273543 states and 1510852 transitions. [2021-02-19 18:16:59,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 273543 states and 1510852 transitions. [2021-02-19 18:17:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:17:01,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:17:01,860 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:17:02,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:17:02,074 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:17:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:17:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1869221307, now seen corresponding path program 17 times [2021-02-19 18:17:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:17:02,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690014379] [2021-02-19 18:17:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:17:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:02,146 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 18:17:02,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690014379] [2021-02-19 18:17:02,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943720609] [2021-02-19 18:17:02,146 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 18:17:02,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:17:02,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:17:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:17:02,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:17:02,247 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 18:17:02,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:17:02,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:17:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514097304] [2021-02-19 18:17:02,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:17:02,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:17:02,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:17:02,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:17:02,249 INFO L87 Difference]: Start difference. First operand 273543 states and 1510852 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 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 18:17:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:17:05,587 INFO L93 Difference]: Finished difference Result 299201 states and 1626883 transitions. [2021-02-19 18:17:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:17:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:17:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:17:07,554 INFO L225 Difference]: With dead ends: 299201 [2021-02-19 18:17:07,555 INFO L226 Difference]: Without dead ends: 297353 [2021-02-19 18:17:07,555 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:17:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297353 states. [2021-02-19 18:17:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297353 to 267252. [2021-02-19 18:17:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267252 states, 267251 states have (on average 5.527066315935207) internal successors, (1477114), 267251 states have internal predecessors, (1477114), 0 states have call successors, (0), 0 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 18:17:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267252 states to 267252 states and 1477114 transitions. [2021-02-19 18:17:17,146 INFO L78 Accepts]: Start accepts. Automaton has 267252 states and 1477114 transitions. Word has length 39 [2021-02-19 18:17:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:17:17,146 INFO L480 AbstractCegarLoop]: Abstraction has 267252 states and 1477114 transitions. [2021-02-19 18:17:17,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 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 18:17:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 267252 states and 1477114 transitions. [2021-02-19 18:17:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:17:18,030 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:17:18,030 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:17:18,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:17:18,244 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:17:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:17:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash -544893913, now seen corresponding path program 18 times [2021-02-19 18:17:18,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:17:18,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686423048] [2021-02-19 18:17:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:17:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:17:18,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686423048] [2021-02-19 18:17:18,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713306045] [2021-02-19 18:17:18,268 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:17:18,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:17:18,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:17:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:17:18,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:17:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-19 18:17:18,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:17:18,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-02-19 18:17:18,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232305365] [2021-02-19 18:17:18,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:17:18,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:17:18,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:17:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:17:18,371 INFO L87 Difference]: Start difference. First operand 267252 states and 1477114 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 18:17:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:17:23,656 INFO L93 Difference]: Finished difference Result 501369 states and 2669361 transitions. [2021-02-19 18:17:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:17:23,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 41 [2021-02-19 18:17:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:17:28,595 INFO L225 Difference]: With dead ends: 501369 [2021-02-19 18:17:28,595 INFO L226 Difference]: Without dead ends: 500765 [2021-02-19 18:17:28,595 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:17:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500765 states. [2021-02-19 18:17:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500765 to 353092. [2021-02-19 18:17:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353092 states, 353091 states have (on average 5.580306493226958) internal successors, (1970356), 353091 states have internal predecessors, (1970356), 0 states have call successors, (0), 0 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 18:17:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353092 states to 353092 states and 1970356 transitions. [2021-02-19 18:17:45,084 INFO L78 Accepts]: Start accepts. Automaton has 353092 states and 1970356 transitions. Word has length 41 [2021-02-19 18:17:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:17:45,084 INFO L480 AbstractCegarLoop]: Abstraction has 353092 states and 1970356 transitions. [2021-02-19 18:17:45,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 18:17:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 353092 states and 1970356 transitions. [2021-02-19 18:17:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:17:46,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:17:46,948 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:17:47,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 18:17:47,148 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:17:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:17:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash 264564441, now seen corresponding path program 19 times [2021-02-19 18:17:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:17:47,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135293088] [2021-02-19 18:17:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:17:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:17:47,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135293088] [2021-02-19 18:17:47,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592416048] [2021-02-19 18:17:47,184 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:17:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:17:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:17:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:17:47,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:17:47,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:17:47,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925244292] [2021-02-19 18:17:47,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:17:47,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:17:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:17:47,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:17:47,256 INFO L87 Difference]: Start difference. First operand 353092 states and 1970356 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 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 18:17:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:17:54,455 INFO L93 Difference]: Finished difference Result 635281 states and 3484830 transitions. [2021-02-19 18:17:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:17:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 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 41 [2021-02-19 18:17:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:17:58,630 INFO L225 Difference]: With dead ends: 635281 [2021-02-19 18:17:58,630 INFO L226 Difference]: Without dead ends: 634099 [2021-02-19 18:17:58,630 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:18:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634099 states. [2021-02-19 18:18:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634099 to 476991. [2021-02-19 18:18:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476991 states, 476990 states have (on average 5.6320048638336235) internal successors, (2686410), 476990 states have internal predecessors, (2686410), 0 states have call successors, (0), 0 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 18:18:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476991 states to 476991 states and 2686410 transitions. [2021-02-19 18:18:24,064 INFO L78 Accepts]: Start accepts. Automaton has 476991 states and 2686410 transitions. Word has length 41 [2021-02-19 18:18:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:18:24,064 INFO L480 AbstractCegarLoop]: Abstraction has 476991 states and 2686410 transitions. [2021-02-19 18:18:24,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 5 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 18:18:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 476991 states and 2686410 transitions. [2021-02-19 18:18:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:18:27,365 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:18:27,365 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:18:27,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:18:27,578 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:18:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:18:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1831411029, now seen corresponding path program 20 times [2021-02-19 18:18:27,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:18:27,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176882671] [2021-02-19 18:18:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:18:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:18:27,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176882671] [2021-02-19 18:18:27,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851533039] [2021-02-19 18:18:27,598 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:18:27,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:18:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:18:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:18:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:18:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:18:27,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:18:27,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-02-19 18:18:27,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916879435] [2021-02-19 18:18:27,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:18:27,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:18:27,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:18:27,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:18:27,690 INFO L87 Difference]: Start difference. First operand 476991 states and 2686410 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:18:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:18:37,477 INFO L93 Difference]: Finished difference Result 729512 states and 3884453 transitions. [2021-02-19 18:18:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:18:37,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:18:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:18:44,992 INFO L225 Difference]: With dead ends: 729512 [2021-02-19 18:18:44,992 INFO L226 Difference]: Without dead ends: 721634 [2021-02-19 18:18:44,993 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:18:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721634 states. [2021-02-19 18:19:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721634 to 475868. [2021-02-19 18:19:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475868 states, 475867 states have (on average 5.614427980927444) internal successors, (2671721), 475867 states have internal predecessors, (2671721), 0 states have call successors, (0), 0 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 18:19:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475868 states to 475868 states and 2671721 transitions. [2021-02-19 18:19:09,375 INFO L78 Accepts]: Start accepts. Automaton has 475868 states and 2671721 transitions. Word has length 41 [2021-02-19 18:19:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:09,376 INFO L480 AbstractCegarLoop]: Abstraction has 475868 states and 2671721 transitions. [2021-02-19 18:19:09,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:19:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 475868 states and 2671721 transitions. [2021-02-19 18:19:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:19:13,414 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:19:13,422 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:19:13,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 18:19:13,630 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:19:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1097405943, now seen corresponding path program 21 times [2021-02-19 18:19:13,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:13,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654803226] [2021-02-19 18:19:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:19:13,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654803226] [2021-02-19 18:19:13,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788234028] [2021-02-19 18:19:13,663 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:19:13,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:19:13,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:19:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:19:13,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:19:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:19:13,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:19:13,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:19:13,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096878906] [2021-02-19 18:19:13,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:19:13,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:13,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:19:13,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:19:13,804 INFO L87 Difference]: Start difference. First operand 475868 states and 2671721 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:19:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:29,050 INFO L93 Difference]: Finished difference Result 928173 states and 5009824 transitions. [2021-02-19 18:19:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:19:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:19:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:39,044 INFO L225 Difference]: With dead ends: 928173 [2021-02-19 18:19:39,045 INFO L226 Difference]: Without dead ends: 923418 [2021-02-19 18:19:39,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:19:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923418 states. [2021-02-19 18:20:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923418 to 633154. [2021-02-19 18:20:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633154 states, 633153 states have (on average 5.6446593477405935) internal successors, (3573933), 633153 states have internal predecessors, (3573933), 0 states have call successors, (0), 0 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 18:20:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633154 states to 633154 states and 3573933 transitions. [2021-02-19 18:20:21,346 INFO L78 Accepts]: Start accepts. Automaton has 633154 states and 3573933 transitions. Word has length 41 [2021-02-19 18:20:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:21,356 INFO L480 AbstractCegarLoop]: Abstraction has 633154 states and 3573933 transitions. [2021-02-19 18:20:21,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 633154 states and 3573933 transitions. [2021-02-19 18:20:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:20:26,965 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:26,965 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, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:27,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:27,180 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:20:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1779107091, now seen corresponding path program 22 times [2021-02-19 18:20:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:27,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476878298] [2021-02-19 18:20:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:20:27,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476878298] [2021-02-19 18:20:27,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689976889] [2021-02-19 18:20:27,238 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:27,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:20:27,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:20:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:20:27,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:27,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-02-19 18:20:27,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964040289] [2021-02-19 18:20:27,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:20:27,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:20:27,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:20:27,438 INFO L87 Difference]: Start difference. First operand 633154 states and 3573933 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)