/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/difference-det-QTX.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:53:03,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:53:03,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:53:03,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 19:53:03,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 19:53:03,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 19:53:03,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 19:53:03,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 19:53:03,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 19:53:03,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 19:53:03,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 19:53:03,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 19:53:03,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 19:53:03,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 19:53:03,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 19:53:03,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 19:53:03,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 19:53:03,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 19:53:03,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 19:53:03,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 19:53:03,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 19:53:03,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 19:53:03,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 19:53:03,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 19:53:03,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 19:53:03,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 19:53:03,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 19:53:03,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 19:53:03,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 19:53:03,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 19:53:03,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 19:53:03,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 19:53:03,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 19:53:03,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 19:53:03,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 19:53:03,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 19:53:03,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 19:53:03,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 19:53:03,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 19:53:03,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 19:53:03,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 19:53:03,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 19:53:03,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:53:03,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:53:03,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:53:03,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:53:03,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:53:03,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:53:03,708 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:53:03,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:53:03,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:53:03,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:53:03,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:53:03,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:53:03,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:53:03,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:53:03,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:53:03,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:53:03,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:53:03,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:53:04,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:53:04,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:53:04,012 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:53:04,013 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:53:04,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/difference-det-QTX.wvr.bpl [2021-02-19 19:53:04,014 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/difference-det-QTX.wvr.bpl' [2021-02-19 19:53:04,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:53:04,054 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:53:04,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:53:04,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:53:04,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:53:04,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:53:04,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:53:04,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:53:04,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:53:04,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... [2021-02-19 19:53:04,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:53:04,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:53:04,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:53:04,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:53:04,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:53:04,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:53:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:53:04,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:53:04,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:53:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:53:04,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:53:04,142 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:53:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:53:04,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:53:04,142 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:53:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:53:04,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:53:04,142 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 19:53:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 19:53:04,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 19:53:04,143 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:53:04,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:53:04,393 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:53:04,395 INFO L202 PluginConnector]: Adding new model difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:53:04 BoogieIcfgContainer [2021-02-19 19:53:04,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:53:04,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:53:04,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:53:04,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:53:04,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:53:04" (1/2) ... [2021-02-19 19:53:04,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd00f45 and model type difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:53:04, skipping insertion in model container [2021-02-19 19:53:04,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det-QTX.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:53:04" (2/2) ... [2021-02-19 19:53:04,399 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det-QTX.wvr.bpl [2021-02-19 19:53:04,402 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:53:04,402 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:53:04,404 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:53:04,405 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:53:04,464 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 19:53:04,474 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 19:53:04,486 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:53:04,486 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:53:04,486 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:53:04,486 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:53:04,487 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:53:04,487 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:53:04,487 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:53:04,487 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:53:04,499 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-02-19 19:53:04,540 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 19:53:04,560 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:04,561 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] [2021-02-19 19:53:04,561 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1523995839, now seen corresponding path program 1 times [2021-02-19 19:53:04,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:04,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33058847] [2021-02-19 19:53:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:04,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33058847] [2021-02-19 19:53:04,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:04,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:53:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880351612] [2021-02-19 19:53:04,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:53:04,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:53:04,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 19:53:04,748 INFO L87 Difference]: Start difference. First operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:04,814 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-02-19 19:53:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:53:04,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 19:53:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:04,834 INFO L225 Difference]: With dead ends: 1268 [2021-02-19 19:53:04,834 INFO L226 Difference]: Without dead ends: 1057 [2021-02-19 19:53:04,835 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 19:53:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-02-19 19:53:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-02-19 19:53:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-02-19 19:53:04,928 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-02-19 19:53:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:04,929 INFO L480 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-02-19 19:53:04,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-02-19 19:53:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:53:04,931 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:04,931 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] [2021-02-19 19:53:04,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:53:04,932 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:04,933 INFO L82 PathProgramCache]: Analyzing trace with hash 575240127, now seen corresponding path program 1 times [2021-02-19 19:53:04,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:04,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469062990] [2021-02-19 19:53:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:04,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469062990] [2021-02-19 19:53:04,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753477796] [2021-02-19 19:53:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:53:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:05,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:05,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-02-19 19:53:05,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761853747] [2021-02-19 19:53:05,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:53:05,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:53:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:53:05,227 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:05,350 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-02-19 19:53:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:53:05,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:53:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:05,357 INFO L225 Difference]: With dead ends: 1233 [2021-02-19 19:53:05,357 INFO L226 Difference]: Without dead ends: 1233 [2021-02-19 19:53:05,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:53:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-02-19 19:53:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-02-19 19:53:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-02-19 19:53:05,393 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-02-19 19:53:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:05,394 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-02-19 19:53:05,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-02-19 19:53:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:53:05,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:05,397 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] [2021-02-19 19:53:05,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 19:53:05,602 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1702089631, now seen corresponding path program 1 times [2021-02-19 19:53:05,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:05,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956788253] [2021-02-19 19:53:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:05,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956788253] [2021-02-19 19:53:05,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:05,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:53:05,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136568191] [2021-02-19 19:53:05,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:53:05,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:05,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:53:05,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:53:05,636 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:05,683 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-02-19 19:53:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:53:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:53:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:05,688 INFO L225 Difference]: With dead ends: 1101 [2021-02-19 19:53:05,688 INFO L226 Difference]: Without dead ends: 1047 [2021-02-19 19:53:05,689 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:53:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-02-19 19:53:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-02-19 19:53:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-02-19 19:53:05,716 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-02-19 19:53:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:05,716 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-02-19 19:53:05,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-02-19 19:53:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:53:05,720 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:05,721 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] [2021-02-19 19:53:05,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 19:53:05,721 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash -905903551, now seen corresponding path program 2 times [2021-02-19 19:53:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:05,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544415792] [2021-02-19 19:53:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:05,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544415792] [2021-02-19 19:53:05,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:05,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:53:05,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399978880] [2021-02-19 19:53:05,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:53:05,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:53:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:53:05,823 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:05,871 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-02-19 19:53:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:53:05,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:53:05,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:05,876 INFO L225 Difference]: With dead ends: 834 [2021-02-19 19:53:05,876 INFO L226 Difference]: Without dead ends: 834 [2021-02-19 19:53:05,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:53:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-02-19 19:53:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-02-19 19:53:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-02-19 19:53:05,895 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-02-19 19:53:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:05,896 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-02-19 19:53:05,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-02-19 19:53:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 19:53:05,898 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:05,898 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] [2021-02-19 19:53:05,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 19:53:05,898 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash -258000899, now seen corresponding path program 2 times [2021-02-19 19:53:05,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:05,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943162229] [2021-02-19 19:53:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:05,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943162229] [2021-02-19 19:53:05,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:05,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:53:05,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80960925] [2021-02-19 19:53:05,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:53:05,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:05,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:53:05,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:53:05,944 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:05,992 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-02-19 19:53:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:53:05,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-02-19 19:53:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:05,996 INFO L225 Difference]: With dead ends: 878 [2021-02-19 19:53:05,996 INFO L226 Difference]: Without dead ends: 838 [2021-02-19 19:53:05,996 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 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 19:53:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-02-19 19:53:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-02-19 19:53:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-02-19 19:53:06,017 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-02-19 19:53:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:06,017 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-02-19 19:53:06,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-02-19 19:53:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 19:53:06,022 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:06,022 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] [2021-02-19 19:53:06,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 19:53:06,022 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1324011871, now seen corresponding path program 1 times [2021-02-19 19:53:06,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:06,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529111350] [2021-02-19 19:53:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:06,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529111350] [2021-02-19 19:53:06,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374927306] [2021-02-19 19:53:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:53:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:06,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:06,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-02-19 19:53:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561974251] [2021-02-19 19:53:06,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:53:06,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:53:06,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:53:06,261 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) 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 19:53:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:06,328 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-02-19 19:53:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:53:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) 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 30 [2021-02-19 19:53:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:06,356 INFO L225 Difference]: With dead ends: 3314 [2021-02-19 19:53:06,356 INFO L226 Difference]: Without dead ends: 3000 [2021-02-19 19:53:06,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:53:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-02-19 19:53:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-02-19 19:53:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-02-19 19:53:06,419 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-02-19 19:53:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:06,419 INFO L480 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-02-19 19:53:06,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) 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 19:53:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-02-19 19:53:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 19:53:06,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:06,424 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] [2021-02-19 19:53:06,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:06,644 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2136850305, now seen corresponding path program 2 times [2021-02-19 19:53:06,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:06,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664437609] [2021-02-19 19:53:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:53:06,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664437609] [2021-02-19 19:53:06,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:06,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:53:06,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747837534] [2021-02-19 19:53:06,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:53:06,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:06,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:53:06,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:53:06,685 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:06,746 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-02-19 19:53:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:53:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 19:53:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:06,762 INFO L225 Difference]: With dead ends: 3426 [2021-02-19 19:53:06,762 INFO L226 Difference]: Without dead ends: 3395 [2021-02-19 19:53:06,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:53:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-02-19 19:53:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-02-19 19:53:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-02-19 19:53:06,829 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-02-19 19:53:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:06,830 INFO L480 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-02-19 19:53:06,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-02-19 19:53:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:06,836 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:06,837 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] [2021-02-19 19:53:06,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 19:53:06,837 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:06,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1714695901, now seen corresponding path program 3 times [2021-02-19 19:53:06,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:06,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456554317] [2021-02-19 19:53:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:06,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456554317] [2021-02-19 19:53:06,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192318008] [2021-02-19 19:53:06,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:06,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:53:06,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:06,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:53:06,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:07,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:07,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-02-19 19:53:07,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693036567] [2021-02-19 19:53:07,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:53:07,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:53:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:53:07,053 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:07,382 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-02-19 19:53:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:53:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 32 [2021-02-19 19:53:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:07,432 INFO L225 Difference]: With dead ends: 10235 [2021-02-19 19:53:07,433 INFO L226 Difference]: Without dead ends: 10235 [2021-02-19 19:53:07,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:53:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-02-19 19:53:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-02-19 19:53:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-02-19 19:53:07,617 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-02-19 19:53:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:07,618 INFO L480 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-02-19 19:53:07,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-02-19 19:53:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:07,629 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:07,629 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] [2021-02-19 19:53:07,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:07,842 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:07,843 INFO L82 PathProgramCache]: Analyzing trace with hash -20744097, now seen corresponding path program 1 times [2021-02-19 19:53:07,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:07,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957611365] [2021-02-19 19:53:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:07,890 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 19:53:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957611365] [2021-02-19 19:53:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049505070] [2021-02-19 19:53:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:53:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:08,003 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 19:53:08,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:08,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 19:53:08,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458518755] [2021-02-19 19:53:08,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:53:08,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:53:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:53:08,007 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 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 19:53:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:08,123 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-02-19 19:53:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:53:08,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 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 32 [2021-02-19 19:53:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:08,150 INFO L225 Difference]: With dead ends: 8631 [2021-02-19 19:53:08,150 INFO L226 Difference]: Without dead ends: 8631 [2021-02-19 19:53:08,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:53:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-02-19 19:53:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-02-19 19:53:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-02-19 19:53:08,338 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-02-19 19:53:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:08,339 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-02-19 19:53:08,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 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 19:53:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-02-19 19:53:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:08,355 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:08,355 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] [2021-02-19 19:53:08,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:08,569 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2033681569, now seen corresponding path program 4 times [2021-02-19 19:53:08,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:08,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662102623] [2021-02-19 19:53:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:08,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662102623] [2021-02-19 19:53:08,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167494826] [2021-02-19 19:53:08,623 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:53:08,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:53:08,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:53:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:08,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:08,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:53:08,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412634761] [2021-02-19 19:53:08,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:53:08,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:53:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:53:08,769 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:09,120 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-02-19 19:53:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:53:09,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 19:53:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:09,184 INFO L225 Difference]: With dead ends: 15361 [2021-02-19 19:53:09,184 INFO L226 Difference]: Without dead ends: 15091 [2021-02-19 19:53:09,184 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:53:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-02-19 19:53:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-02-19 19:53:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-02-19 19:53:09,510 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-02-19 19:53:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:09,510 INFO L480 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-02-19 19:53:09,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-02-19 19:53:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:09,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:09,530 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] [2021-02-19 19:53:09,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:53:09,745 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash 136672093, now seen corresponding path program 1 times [2021-02-19 19:53:09,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:09,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064769977] [2021-02-19 19:53:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:53:09,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064769977] [2021-02-19 19:53:09,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:09,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 19:53:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187281501] [2021-02-19 19:53:09,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:53:09,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:09,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:53:09,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:53:09,820 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:09,919 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-02-19 19:53:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:53:09,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 19:53:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:09,950 INFO L225 Difference]: With dead ends: 11634 [2021-02-19 19:53:09,950 INFO L226 Difference]: Without dead ends: 11496 [2021-02-19 19:53:09,951 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:53:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-02-19 19:53:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-02-19 19:53:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-02-19 19:53:10,288 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-02-19 19:53:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:10,289 INFO L480 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-02-19 19:53:10,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-02-19 19:53:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:10,309 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:10,309 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] [2021-02-19 19:53:10,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 19:53:10,309 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1669905955, now seen corresponding path program 2 times [2021-02-19 19:53:10,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:10,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799391255] [2021-02-19 19:53:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:53:10,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799391255] [2021-02-19 19:53:10,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:10,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 19:53:10,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820292606] [2021-02-19 19:53:10,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:53:10,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:53:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:53:10,381 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:10,456 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-02-19 19:53:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:53:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 19:53:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:10,483 INFO L225 Difference]: With dead ends: 10977 [2021-02-19 19:53:10,483 INFO L226 Difference]: Without dead ends: 10950 [2021-02-19 19:53:10,484 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:53:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-02-19 19:53:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-02-19 19:53:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-02-19 19:53:10,753 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-02-19 19:53:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:10,753 INFO L480 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-02-19 19:53:10,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-02-19 19:53:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:10,833 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:10,833 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] [2021-02-19 19:53:10,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 19:53:10,844 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1315131999, now seen corresponding path program 2 times [2021-02-19 19:53:10,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:10,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673262053] [2021-02-19 19:53:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:53:10,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673262053] [2021-02-19 19:53:10,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:53:10,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 19:53:10,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588182063] [2021-02-19 19:53:10,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:53:10,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:10,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:53:10,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:53:10,882 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:11,021 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-02-19 19:53:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:53:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 19:53:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:11,048 INFO L225 Difference]: With dead ends: 11062 [2021-02-19 19:53:11,049 INFO L226 Difference]: Without dead ends: 11002 [2021-02-19 19:53:11,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 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 19:53:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-02-19 19:53:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-02-19 19:53:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-02-19 19:53:11,274 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-02-19 19:53:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:11,274 INFO L480 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-02-19 19:53:11,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-02-19 19:53:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:11,365 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:11,365 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] [2021-02-19 19:53:11,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 19:53:11,365 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1999801537, now seen corresponding path program 5 times [2021-02-19 19:53:11,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:11,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759870941] [2021-02-19 19:53:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:11,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759870941] [2021-02-19 19:53:11,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318284411] [2021-02-19 19:53:11,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:11,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:53:11,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:53:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:11,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:11,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 19:53:11,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113760349] [2021-02-19 19:53:11,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:53:11,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:11,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:53:11,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:53:11,542 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:11,871 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-02-19 19:53:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:53:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 32 [2021-02-19 19:53:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:11,916 INFO L225 Difference]: With dead ends: 17289 [2021-02-19 19:53:11,917 INFO L226 Difference]: Without dead ends: 17289 [2021-02-19 19:53:11,917 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:53:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-02-19 19:53:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-02-19 19:53:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-02-19 19:53:12,281 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-02-19 19:53:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:12,282 INFO L480 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-02-19 19:53:12,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-02-19 19:53:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:12,302 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:12,302 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] [2021-02-19 19:53:12,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:12,520 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:12,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1647263107, now seen corresponding path program 6 times [2021-02-19 19:53:12,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:12,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766226235] [2021-02-19 19:53:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766226235] [2021-02-19 19:53:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137357541] [2021-02-19 19:53:12,550 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:53:12,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:53:12,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:12,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:12,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:12,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 19:53:12,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947079780] [2021-02-19 19:53:12,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:53:12,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:53:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:53:12,693 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:13,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:13,048 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-02-19 19:53:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:53:13,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 32 [2021-02-19 19:53:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:13,089 INFO L225 Difference]: With dead ends: 17283 [2021-02-19 19:53:13,089 INFO L226 Difference]: Without dead ends: 17145 [2021-02-19 19:53:13,089 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:53:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-02-19 19:53:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-02-19 19:53:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-02-19 19:53:13,333 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-02-19 19:53:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:13,333 INFO L480 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-02-19 19:53:13,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-02-19 19:53:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:13,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:13,351 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] [2021-02-19 19:53:13,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:53:13,551 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash 99298945, now seen corresponding path program 7 times [2021-02-19 19:53:13,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:13,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720195778] [2021-02-19 19:53:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:53:13,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720195778] [2021-02-19 19:53:13,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654481703] [2021-02-19 19:53:13,598 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:53:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:13,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:13,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:53:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399602739] [2021-02-19 19:53:13,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:53:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:53:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:53:13,819 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:14,227 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-02-19 19:53:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:53:14,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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 32 [2021-02-19 19:53:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:14,298 INFO L225 Difference]: With dead ends: 26096 [2021-02-19 19:53:14,298 INFO L226 Difference]: Without dead ends: 26096 [2021-02-19 19:53:14,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:53:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-02-19 19:53:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-02-19 19:53:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-02-19 19:53:14,805 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-02-19 19:53:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:14,806 INFO L480 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-02-19 19:53:14,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-02-19 19:53:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:14,832 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:14,832 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] [2021-02-19 19:53:15,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 19:53:15,033 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2050255391, now seen corresponding path program 8 times [2021-02-19 19:53:15,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:15,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261046924] [2021-02-19 19:53:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:53:15,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261046924] [2021-02-19 19:53:15,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927153915] [2021-02-19 19:53:15,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:15,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:53:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:15,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:53:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:15,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:15,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 19:53:15,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204377326] [2021-02-19 19:53:15,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:53:15,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:53:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:53:15,206 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:15,600 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-02-19 19:53:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:53:15,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 19:53:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:15,645 INFO L225 Difference]: With dead ends: 19071 [2021-02-19 19:53:15,645 INFO L226 Difference]: Without dead ends: 19009 [2021-02-19 19:53:15,646 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:53:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-02-19 19:53:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-02-19 19:53:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-02-19 19:53:15,998 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-02-19 19:53:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:15,998 INFO L480 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-02-19 19:53:15,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-02-19 19:53:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:16,026 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:16,026 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] [2021-02-19 19:53:16,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 19:53:16,233 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1651134089, now seen corresponding path program 9 times [2021-02-19 19:53:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:16,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677861546] [2021-02-19 19:53:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:53:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677861546] [2021-02-19 19:53:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620961437] [2021-02-19 19:53:16,278 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:16,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:53:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:53:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:16,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:16,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 19:53:16,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054272218] [2021-02-19 19:53:16,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:53:16,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:53:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:53:16,399 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:16,734 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-02-19 19:53:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:53:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 32 [2021-02-19 19:53:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:16,808 INFO L225 Difference]: With dead ends: 25596 [2021-02-19 19:53:16,809 INFO L226 Difference]: Without dead ends: 25518 [2021-02-19 19:53:16,809 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:53:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-02-19 19:53:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-02-19 19:53:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-02-19 19:53:17,283 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-02-19 19:53:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:17,283 INFO L480 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-02-19 19:53:17,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-02-19 19:53:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 19:53:17,312 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:17,313 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] [2021-02-19 19:53:17,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:53:17,527 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:17,528 INFO L82 PathProgramCache]: Analyzing trace with hash -444262939, now seen corresponding path program 10 times [2021-02-19 19:53:17,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:17,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454604177] [2021-02-19 19:53:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454604177] [2021-02-19 19:53:17,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451004261] [2021-02-19 19:53:17,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:53:17,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:53:17,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:17,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:17,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:17,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:53:17,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373012036] [2021-02-19 19:53:17,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:53:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:53:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:53:17,696 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:18,087 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-02-19 19:53:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:53:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 32 [2021-02-19 19:53:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:18,151 INFO L225 Difference]: With dead ends: 25214 [2021-02-19 19:53:18,151 INFO L226 Difference]: Without dead ends: 25094 [2021-02-19 19:53:18,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:53:18,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-02-19 19:53:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-02-19 19:53:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-02-19 19:53:18,633 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-02-19 19:53:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:18,633 INFO L480 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-02-19 19:53:18,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-02-19 19:53:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 19:53:18,662 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:18,662 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] [2021-02-19 19:53:18,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:18,863 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:18,863 INFO L82 PathProgramCache]: Analyzing trace with hash -476087649, now seen corresponding path program 11 times [2021-02-19 19:53:18,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:18,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989754226] [2021-02-19 19:53:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:18,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989754226] [2021-02-19 19:53:18,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044396728] [2021-02-19 19:53:18,904 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:18,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:53:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:18,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:53:18,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:19,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:19,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-02-19 19:53:19,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094721963] [2021-02-19 19:53:19,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:53:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:53:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:53:19,057 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:19,313 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-02-19 19:53:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:53:19,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 19:53:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:19,398 INFO L225 Difference]: With dead ends: 30028 [2021-02-19 19:53:19,398 INFO L226 Difference]: Without dead ends: 29440 [2021-02-19 19:53:19,399 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:53:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-02-19 19:53:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-02-19 19:53:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-02-19 19:53:20,002 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-02-19 19:53:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:20,002 INFO L480 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-02-19 19:53:20,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-02-19 19:53:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 19:53:20,047 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:20,047 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] [2021-02-19 19:53:20,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:20,250 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1579254331, now seen corresponding path program 12 times [2021-02-19 19:53:20,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:20,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113466647] [2021-02-19 19:53:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:53:20,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113466647] [2021-02-19 19:53:20,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373703808] [2021-02-19 19:53:20,294 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:20,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:53:20,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:53:20,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:20,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:20,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-02-19 19:53:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253530227] [2021-02-19 19:53:20,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:53:20,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:53:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:53:20,426 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:20,840 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-02-19 19:53:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:53:20,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 19:53:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:21,039 INFO L225 Difference]: With dead ends: 60940 [2021-02-19 19:53:21,039 INFO L226 Difference]: Without dead ends: 58958 [2021-02-19 19:53:21,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:53:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-02-19 19:53:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-02-19 19:53:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-02-19 19:53:22,323 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-02-19 19:53:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:22,323 INFO L480 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-02-19 19:53:22,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-02-19 19:53:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 19:53:22,412 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:22,412 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] [2021-02-19 19:53:22,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 19:53:22,614 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash 274629311, now seen corresponding path program 13 times [2021-02-19 19:53:22,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:22,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938006490] [2021-02-19 19:53:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:53:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938006490] [2021-02-19 19:53:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098471844] [2021-02-19 19:53:22,655 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:22,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:53:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:22,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:22,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-02-19 19:53:22,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943385711] [2021-02-19 19:53:22,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:53:22,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:22,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:53:22,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:53:22,795 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:23,207 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-02-19 19:53:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:53:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 19:53:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:23,406 INFO L225 Difference]: With dead ends: 60941 [2021-02-19 19:53:23,407 INFO L226 Difference]: Without dead ends: 60279 [2021-02-19 19:53:23,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:53:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-02-19 19:53:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-02-19 19:53:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-02-19 19:53:25,527 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-02-19 19:53:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:25,527 INFO L480 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-02-19 19:53:25,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-02-19 19:53:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:53:25,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:25,715 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:53:25,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:25,916 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1407314205, now seen corresponding path program 14 times [2021-02-19 19:53:25,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:25,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894813411] [2021-02-19 19:53:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:25,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894813411] [2021-02-19 19:53:25,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463755203] [2021-02-19 19:53:25,996 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:26,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:53:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:26,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:53:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:26,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:26,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 19:53:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812169212] [2021-02-19 19:53:26,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:53:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:53:26,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:53:26,156 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:27,382 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-02-19 19:53:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:53:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 19:53:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:28,070 INFO L225 Difference]: With dead ends: 115835 [2021-02-19 19:53:28,070 INFO L226 Difference]: Without dead ends: 115835 [2021-02-19 19:53:28,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:53:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-02-19 19:53:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-02-19 19:53:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-02-19 19:53:30,418 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-02-19 19:53:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:30,418 INFO L480 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-02-19 19:53:30,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-02-19 19:53:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:53:30,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:30,574 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:53:30,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 19:53:30,775 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:30,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1285104159, now seen corresponding path program 15 times [2021-02-19 19:53:30,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:30,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418497992] [2021-02-19 19:53:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:30,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418497992] [2021-02-19 19:53:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506007737] [2021-02-19 19:53:30,827 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:30,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:53:30,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:53:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:30,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:30,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:53:30,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778711788] [2021-02-19 19:53:30,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:53:30,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:53:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:53:30,981 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:32,507 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-02-19 19:53:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:53:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 36 [2021-02-19 19:53:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:33,368 INFO L225 Difference]: With dead ends: 148781 [2021-02-19 19:53:33,368 INFO L226 Difference]: Without dead ends: 147463 [2021-02-19 19:53:33,369 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:53:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-02-19 19:53:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-02-19 19:53:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-02-19 19:53:37,175 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-02-19 19:53:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:37,177 INFO L480 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-02-19 19:53:37,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-02-19 19:53:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:53:37,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:37,352 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:53:37,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:37,552 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:37,553 INFO L82 PathProgramCache]: Analyzing trace with hash -148600767, now seen corresponding path program 16 times [2021-02-19 19:53:37,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:37,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777968596] [2021-02-19 19:53:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:37,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777968596] [2021-02-19 19:53:37,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062996271] [2021-02-19 19:53:37,592 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:37,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:53:37,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:37,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:53:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:37,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:37,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 19:53:37,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747921352] [2021-02-19 19:53:37,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:53:37,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:37,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:53:37,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:53:37,734 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 19:53:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:39,743 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-02-19 19:53:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:53:39,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 36 [2021-02-19 19:53:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:40,397 INFO L225 Difference]: With dead ends: 170107 [2021-02-19 19:53:40,397 INFO L226 Difference]: Without dead ends: 170087 [2021-02-19 19:53:40,397 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:53:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-02-19 19:53:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-02-19 19:53:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-02-19 19:53:45,074 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-02-19 19:53:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:45,074 INFO L480 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-02-19 19:53:45,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 19:53:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-02-19 19:53:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:53:45,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:45,254 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:53:45,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 19:53:45,454 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash 499301885, now seen corresponding path program 17 times [2021-02-19 19:53:45,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:45,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085767965] [2021-02-19 19:53:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085767965] [2021-02-19 19:53:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618203349] [2021-02-19 19:53:45,494 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:45,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:53:45,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:45,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:53:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:45,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:45,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 19:53:45,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273028968] [2021-02-19 19:53:45,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:53:45,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:45,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:53:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:53:45,640 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 19:53:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:47,084 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-02-19 19:53:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:53:47,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 36 [2021-02-19 19:53:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:47,923 INFO L225 Difference]: With dead ends: 140554 [2021-02-19 19:53:47,923 INFO L226 Difference]: Without dead ends: 140250 [2021-02-19 19:53:47,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:53:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-02-19 19:53:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-02-19 19:53:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-02-19 19:53:51,720 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-02-19 19:53:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:51,720 INFO L480 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-02-19 19:53:51,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 19:53:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-02-19 19:53:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:53:51,947 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:51,947 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:53:52,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 19:53:52,148 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:52,148 INFO L82 PathProgramCache]: Analyzing trace with hash -185979685, now seen corresponding path program 18 times [2021-02-19 19:53:52,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:52,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794498253] [2021-02-19 19:53:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:53:52,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794498253] [2021-02-19 19:53:52,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97315744] [2021-02-19 19:53:52,193 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:52,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:53:52,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:53:52,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:53:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:52,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:52,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 19:53:52,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253758475] [2021-02-19 19:53:52,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:53:52,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:52,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:53:52,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:53:52,341 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 19:53:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:53:53,960 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-02-19 19:53:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:53:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 36 [2021-02-19 19:53:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:53:54,578 INFO L225 Difference]: With dead ends: 157433 [2021-02-19 19:53:54,578 INFO L226 Difference]: Without dead ends: 156538 [2021-02-19 19:53:54,579 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:53:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-02-19 19:53:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-02-19 19:53:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:53:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-02-19 19:53:59,180 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-02-19 19:53:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:53:59,181 INFO L480 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-02-19 19:53:59,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 19:53:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-02-19 19:53:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:53:59,432 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:53:59,432 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:53:59,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 19:53:59,633 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:53:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:53:59,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1614469281, now seen corresponding path program 19 times [2021-02-19 19:53:59,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:53:59,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880503041] [2021-02-19 19:53:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:53:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:59,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880503041] [2021-02-19 19:53:59,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273757483] [2021-02-19 19:53:59,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:53:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:53:59,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:53:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:53:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:53:59,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:53:59,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:53:59,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520114217] [2021-02-19 19:53:59,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:53:59,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:53:59,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:53:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:53:59,818 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 19:54:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:54:01,873 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-02-19 19:54:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:54:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 36 [2021-02-19 19:54:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:54:02,644 INFO L225 Difference]: With dead ends: 192417 [2021-02-19 19:54:02,644 INFO L226 Difference]: Without dead ends: 191725 [2021-02-19 19:54:02,645 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:54:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-02-19 19:54:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-02-19 19:54:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-02-19 19:54:07,649 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-02-19 19:54:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:54:07,649 INFO L480 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-02-19 19:54:07,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 19:54:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-02-19 19:54:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:54:07,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:54:07,856 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forcibly destroying the process [2021-02-19 19:54:08,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 19:54:08,299 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:54:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:54:08,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1942487901, now seen corresponding path program 20 times [2021-02-19 19:54:08,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:54:08,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630280562] [2021-02-19 19:54:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] The stream was forcibly closed: stdIn [2021-02-19 19:54:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:54:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:54:08,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630280562] [2021-02-19 19:54:08,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100003148] [2021-02-19 19:54:08,400 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:54:08,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:54:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:54:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:54:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:54:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:54:08,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:54:08,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:54:08,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494037652] [2021-02-19 19:54:08,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:54:08,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:54:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:54:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:54:08,558 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:54:10,538 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-02-19 19:54:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:54:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 19:54:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:54:11,438 INFO L225 Difference]: With dead ends: 221192 [2021-02-19 19:54:11,438 INFO L226 Difference]: Without dead ends: 221192 [2021-02-19 19:54:11,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:54:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-02-19 19:54:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-02-19 19:54:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-02-19 19:54:16,883 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-02-19 19:54:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:54:16,883 INFO L480 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-02-19 19:54:16,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-02-19 19:54:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:54:17,081 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:54:17,081 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:54:17,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 19:54:17,286 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:54:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:54:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1279522205, now seen corresponding path program 21 times [2021-02-19 19:54:17,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:54:17,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670576692] [2021-02-19 19:54:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:54:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:54:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:54:17,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670576692] [2021-02-19 19:54:17,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92914417] [2021-02-19 19:54:17,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:54:17,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:54:17,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:54:17,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:54:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:54:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:54:17,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:54:17,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:54:17,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351812496] [2021-02-19 19:54:17,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:54:17,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:54:17,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:54:17,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:54:17,473 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 19:54:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:54:19,103 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-02-19 19:54:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:54:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 36 [2021-02-19 19:54:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:54:19,635 INFO L225 Difference]: With dead ends: 149434 [2021-02-19 19:54:19,635 INFO L226 Difference]: Without dead ends: 149030 [2021-02-19 19:54:19,636 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:54:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-02-19 19:54:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-02-19 19:54:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-02-19 19:54:24,277 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-02-19 19:54:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:54:24,277 INFO L480 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-02-19 19:54:24,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 19:54:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-02-19 19:54:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:54:24,482 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:54:24,483 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:54:24,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:54:24,696 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:54:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:54:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1751129919, now seen corresponding path program 22 times [2021-02-19 19:54:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:54:24,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176424963] [2021-02-19 19:54:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:54:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:54:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:54:24,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176424963] [2021-02-19 19:54:24,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819598782] [2021-02-19 19:54:24,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:54:24,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:54:24,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:54:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:54:24,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:54:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:54:25,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:54:25,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:54:25,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558913212] [2021-02-19 19:54:25,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:54:25,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:54:25,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:54:25,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:54:25,402 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:54:27,709 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-02-19 19:54:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:54:27,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 19:54:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:54:28,769 INFO L225 Difference]: With dead ends: 262218 [2021-02-19 19:54:28,770 INFO L226 Difference]: Without dead ends: 262218 [2021-02-19 19:54:28,770 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:54:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-02-19 19:54:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-02-19 19:54:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-02-19 19:54:37,298 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-02-19 19:54:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:54:37,298 INFO L480 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-02-19 19:54:37,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-02-19 19:54:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:54:37,617 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:54:37,617 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:54:37,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 19:54:37,819 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:54:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:54:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash 793404343, now seen corresponding path program 23 times [2021-02-19 19:54:37,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:54:37,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231708224] [2021-02-19 19:54:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:54:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:54:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:54:37,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231708224] [2021-02-19 19:54:37,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072242866] [2021-02-19 19:54:37,856 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 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 19:54:37,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:54:37,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:54:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:54:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:54:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:54:37,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:54:37,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 19:54:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636337882] [2021-02-19 19:54:37,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:54:37,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:54:37,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:54:37,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:54:37,992 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 19:54:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:54:40,875 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-02-19 19:54:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:54:40,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 36 [2021-02-19 19:54:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:54:41,884 INFO L225 Difference]: With dead ends: 254683 [2021-02-19 19:54:41,884 INFO L226 Difference]: Without dead ends: 254373 [2021-02-19 19:54:41,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:54:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-02-19 19:54:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-02-19 19:54:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:54:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-02-19 19:54:49,634 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-02-19 19:54:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:54:49,634 INFO L480 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-02-19 19:54:49,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 19:54:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-02-19 19:54:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:54:49,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:54:49,935 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:54:50,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:54:50,143 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:54:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:54:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2000275493, now seen corresponding path program 24 times [2021-02-19 19:54:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:54:50,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295088765] [2021-02-19 19:54:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:54:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:54:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:54:50,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295088765] [2021-02-19 19:54:50,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102992498] [2021-02-19 19:54:50,190 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 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 19:54:50,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:54:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:54:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:54:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:54:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:54:51,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:54:51,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:54:51,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024547121] [2021-02-19 19:54:51,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:54:51,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:54:51,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:54:51,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:54:51,014 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 19:54:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:54:53,387 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-02-19 19:54:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:54:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 36 [2021-02-19 19:54:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:54:55,102 INFO L225 Difference]: With dead ends: 283294 [2021-02-19 19:54:55,103 INFO L226 Difference]: Without dead ends: 282784 [2021-02-19 19:54:55,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:54:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-02-19 19:55:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-02-19 19:55:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-02-19 19:55:03,610 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-02-19 19:55:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:03,611 INFO L480 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-02-19 19:55:03,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 19:55:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-02-19 19:55:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 19:55:04,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:04,589 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:04,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 19:55:04,805 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1179376033, now seen corresponding path program 25 times [2021-02-19 19:55:04,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:04,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969140480] [2021-02-19 19:55:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:04,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969140480] [2021-02-19 19:55:04,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347744775] [2021-02-19 19:55:04,860 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 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 19:55:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:55:04,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:05,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:05,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:55:05,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190748571] [2021-02-19 19:55:05,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:55:05,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:55:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:55:05,022 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 19:55:07,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:07,595 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-02-19 19:55:07,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:55:07,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 36 [2021-02-19 19:55:07,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:09,388 INFO L225 Difference]: With dead ends: 290122 [2021-02-19 19:55:09,388 INFO L226 Difference]: Without dead ends: 289652 [2021-02-19 19:55:09,389 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:55:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-02-19 19:55:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-02-19 19:55:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-02-19 19:55:18,977 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-02-19 19:55:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:18,977 INFO L480 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-02-19 19:55:18,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 19:55:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-02-19 19:55:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 19:55:20,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:20,145 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:20,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 19:55:20,362 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash 482845919, now seen corresponding path program 26 times [2021-02-19 19:55:20,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:20,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985498539] [2021-02-19 19:55:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:20,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985498539] [2021-02-19 19:55:20,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829074014] [2021-02-19 19:55:20,420 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 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 19:55:20,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:55:20,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:55:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:20,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:20,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-02-19 19:55:20,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957513932] [2021-02-19 19:55:20,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:55:20,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:20,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:55:20,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:55:20,698 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:23,773 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-02-19 19:55:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:55:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 19:55:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:25,665 INFO L225 Difference]: With dead ends: 275767 [2021-02-19 19:55:25,665 INFO L226 Difference]: Without dead ends: 274998 [2021-02-19 19:55:25,665 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:55:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-02-19 19:55:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-02-19 19:55:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-02-19 19:55:35,357 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-02-19 19:55:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:35,357 INFO L480 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-02-19 19:55:35,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-02-19 19:55:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 19:55:35,859 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:35,859 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:55:36,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 19:55:36,060 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash -674228745, now seen corresponding path program 27 times [2021-02-19 19:55:36,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:36,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890495904] [2021-02-19 19:55:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:55:36,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890495904] [2021-02-19 19:55:36,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677680824] [2021-02-19 19:55:36,111 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:36,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:55:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:55:36,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:55:36,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:36,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:36,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-02-19 19:55:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390678314] [2021-02-19 19:55:36,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:55:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:55:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:55:36,302 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:55:39,955 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-02-19 19:55:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:55:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 19:55:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:55:42,527 INFO L225 Difference]: With dead ends: 394201 [2021-02-19 19:55:42,527 INFO L226 Difference]: Without dead ends: 392734 [2021-02-19 19:55:42,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:55:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-02-19 19:55:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-02-19 19:55:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-02-19 19:55:56,438 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-02-19 19:55:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:55:56,438 INFO L480 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-02-19 19:55:56,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:55:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-02-19 19:55:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 19:55:57,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:55:57,074 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] [2021-02-19 19:55:57,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 19:55:57,275 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:55:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:55:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1562312761, now seen corresponding path program 1 times [2021-02-19 19:55:57,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:55:57,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148381347] [2021-02-19 19:55:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:55:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:55:57,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148381347] [2021-02-19 19:55:57,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206371899] [2021-02-19 19:55:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:55:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:55:57,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 19:55:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:55:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:55:57,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:55:57,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-02-19 19:55:57,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169923714] [2021-02-19 19:55:57,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:55:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:55:57,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:55:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:55:57,504 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:56:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:04,232 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-02-19 19:56:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:56:04,232 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 19:56:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:09,077 INFO L225 Difference]: With dead ends: 586179 [2021-02-19 19:56:09,077 INFO L226 Difference]: Without dead ends: 583951 [2021-02-19 19:56:09,077 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:56:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-02-19 19:56:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-02-19 19:56:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:56:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-02-19 19:56:30,439 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-02-19 19:56:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:56:30,439 INFO L480 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-02-19 19:56:30,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:56:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-02-19 19:56:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 19:56:31,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:56:31,368 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:56:31,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 19:56:31,582 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:56:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:56:31,582 INFO L82 PathProgramCache]: Analyzing trace with hash -743250433, now seen corresponding path program 28 times [2021-02-19 19:56:31,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:56:31,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194128522] [2021-02-19 19:56:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:56:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:56:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:56:31,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194128522] [2021-02-19 19:56:31,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890652231] [2021-02-19 19:56:31,628 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:56:31,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:56:31,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:56:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:56:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:56:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:56:31,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:56:31,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-02-19 19:56:31,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927220079] [2021-02-19 19:56:31,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:56:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:56:31,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:56:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:56:31,780 INFO L87 Difference]: Start difference. First operand 425975 states and 1972884 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:56:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:56:37,400 INFO L93 Difference]: Finished difference Result 560533 states and 2590081 transitions. [2021-02-19 19:56:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:56:37,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 19:56:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:56:41,024 INFO L225 Difference]: With dead ends: 560533 [2021-02-19 19:56:41,024 INFO L226 Difference]: Without dead ends: 559708 [2021-02-19 19:56:41,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:56:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states. [2021-02-19 19:57:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559708 to 545995. [2021-02-19 19:57:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545995 states, 545994 states have (on average 4.646322120755905) internal successors, (2536864), 545994 states have internal predecessors, (2536864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:57:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545995 states to 545995 states and 2536864 transitions. [2021-02-19 19:57:08,610 INFO L78 Accepts]: Start accepts. Automaton has 545995 states and 2536864 transitions. Word has length 38 [2021-02-19 19:57:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:08,610 INFO L480 AbstractCegarLoop]: Abstraction has 545995 states and 2536864 transitions. [2021-02-19 19:57:08,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:57:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 545995 states and 2536864 transitions. [2021-02-19 19:57:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 19:57:11,428 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:57:11,428 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:57:11,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:11,644 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:57:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:57:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1324178339, now seen corresponding path program 29 times [2021-02-19 19:57:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:57:11,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924036132] [2021-02-19 19:57:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:57:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:57:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:11,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924036132] [2021-02-19 19:57:11,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051467669] [2021-02-19 19:57:11,786 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:57:11,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:57:11,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:57:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 19:57:11,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:57:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:57:12,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:57:12,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 19:57:12,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405011534] [2021-02-19 19:57:12,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:57:12,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:57:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:57:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:57:12,002 INFO L87 Difference]: Start difference. First operand 545995 states and 2536864 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:57:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:57:23,795 INFO L93 Difference]: Finished difference Result 810316 states and 3662784 transitions. [2021-02-19 19:57:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:57:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-02-19 19:57:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:57:31,713 INFO L225 Difference]: With dead ends: 810316 [2021-02-19 19:57:31,714 INFO L226 Difference]: Without dead ends: 810316 [2021-02-19 19:57:31,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:57:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810316 states. [2021-02-19 19:57:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810316 to 534782. [2021-02-19 19:57:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534782 states, 534781 states have (on average 4.638676392766385) internal successors, (2480676), 534781 states have internal predecessors, (2480676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:57:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534782 states to 534782 states and 2480676 transitions. [2021-02-19 19:57:59,154 INFO L78 Accepts]: Start accepts. Automaton has 534782 states and 2480676 transitions. Word has length 40 [2021-02-19 19:57:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:57:59,155 INFO L480 AbstractCegarLoop]: Abstraction has 534782 states and 2480676 transitions. [2021-02-19 19:57:59,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:57:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 534782 states and 2480676 transitions. [2021-02-19 19:58:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 19:58:00,354 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:58:00,354 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:58:00,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 19:58:00,555 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:58:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:58:00,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1127053345, now seen corresponding path program 30 times [2021-02-19 19:58:00,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:58:00,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140014136] [2021-02-19 19:58:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:58:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:58:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140014136] [2021-02-19 19:58:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064072565] [2021-02-19 19:58:00,616 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:58:00,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:58:00,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:58:00,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 19:58:00,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:58:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:58:00,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:58:00,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:58:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367633270] [2021-02-19 19:58:00,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:58:00,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:58:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:58:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:58:00,800 INFO L87 Difference]: Start difference. First operand 534782 states and 2480676 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:58:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:58:15,546 INFO L93 Difference]: Finished difference Result 1136355 states and 5157666 transitions. [2021-02-19 19:58:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 19:58:15,547 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-02-19 19:58:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:58:23,255 INFO L225 Difference]: With dead ends: 1136355 [2021-02-19 19:58:23,256 INFO L226 Difference]: Without dead ends: 1133906 [2021-02-19 19:58:23,257 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1280, Invalid=3976, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 19:58:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133906 states. [2021-02-19 19:59:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133906 to 706666. [2021-02-19 19:59:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706666 states, 706665 states have (on average 4.660015707584216) internal successors, (3293070), 706665 states have internal predecessors, (3293070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:59:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706666 states to 706666 states and 3293070 transitions. [2021-02-19 19:59:11,609 INFO L78 Accepts]: Start accepts. Automaton has 706666 states and 3293070 transitions. Word has length 40 [2021-02-19 19:59:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:59:11,609 INFO L480 AbstractCegarLoop]: Abstraction has 706666 states and 3293070 transitions. [2021-02-19 19:59:11,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:59:11,609 INFO L276 IsEmpty]: Start isEmpty. Operand 706666 states and 3293070 transitions. [2021-02-19 19:59:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 19:59:14,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:59:14,781 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:59:14,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 19:59:14,996 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:59:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:59:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1720595649, now seen corresponding path program 31 times [2021-02-19 19:59:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:59:14,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72530503] [2021-02-19 19:59:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:59:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72530503] [2021-02-19 19:59:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131477901] [2021-02-19 19:59:15,073 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:59:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:59:15,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 19:59:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:59:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:59:15,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:59:15,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 19:59:15,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318175940] [2021-02-19 19:59:15,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:59:15,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:59:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:59:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:59:15,289 INFO L87 Difference]: Start difference. First operand 706666 states and 3293070 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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)