/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:40:04,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:40:04,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:40:04,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:40:04,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-22 02:40:04,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-22 02:40:04,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-22 02:40:04,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-22 02:40:04,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-22 02:40:04,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-22 02:40:04,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-22 02:40:04,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-22 02:40:04,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:40:04,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:40:04,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:40:04,378 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-Separate.epf [2021-05-22 02:40:04,407 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:40:04,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:40:04,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:40:04,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:40:04,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:40:04,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:40:04,411 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:40:04,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:40:04,411 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:40:04,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:40:04,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:40:04,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:40:04,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:40:04,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:40:04,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:40:04,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:40:04,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:40:04,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:40:04,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:40:04,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:40:04,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:40:04,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:40:04,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:40:04,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:40:04,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:40:04,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:40:04,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:40:04,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:40:04,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:40:04,414 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:40:04,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:40:04,414 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:40:04,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:40:04,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:40:04,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:40:04,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:40:04,744 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:40:04,745 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:40:04,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2021-05-22 02:40:04,746 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2021-05-22 02:40:04,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:40:04,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:40:04,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:40:04,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:40:04,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:40:04,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:40:04,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:40:04,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:40:04,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:40:04,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/1) ... [2021-05-22 02:40:04,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:40:04,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:40:04,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:40:04,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:40:04,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (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 [2021-05-22 02:40:04,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:40:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:40:04,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:40:04,887 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:40:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:40:04,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:40:04,887 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:40:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:40:04,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:40:04,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:40:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:40:04,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:40:04,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:40:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:40:04,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:40:04,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-22 02:40:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-22 02:40:04,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-22 02:40:04,890 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:40:05,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:40:05,077 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:40:05,079 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:40:05 BoogieIcfgContainer [2021-05-22 02:40:05,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:40:05,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:40:05,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:40:05,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:40:05,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:04" (1/2) ... [2021-05-22 02:40:05,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf157e9 and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:40:05, skipping insertion in model container [2021-05-22 02:40:05,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:40:05" (2/2) ... [2021-05-22 02:40:05,086 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2021-05-22 02:40:05,091 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:40:05,091 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:40:05,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:40:05,092 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:40:05,146 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-05-22 02:40:05,165 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:40:05,182 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:40:05,182 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:40:05,182 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:40:05,182 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:40:05,182 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:40:05,183 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:40:05,183 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:40:05,183 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:40:05,192 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 42 transitions, 124 flow [2021-05-22 02:40:05,506 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:40:05,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:05,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:05,557 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:05,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1318377574, now seen corresponding path program 1 times [2021-05-22 02:40:05,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:05,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364659908] [2021-05-22 02:40:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:05,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364659908] [2021-05-22 02:40:05,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364659908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:05,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:05,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:40:05,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317373849] [2021-05-22 02:40:05,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:40:05,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:05,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:40:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:05,754 INFO L87 Difference]: Start difference. First operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:06,036 INFO L93 Difference]: Finished difference Result 13093 states and 60005 transitions. [2021-05-22 02:40:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:40:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:40:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:06,131 INFO L225 Difference]: With dead ends: 13093 [2021-05-22 02:40:06,131 INFO L226 Difference]: Without dead ends: 8907 [2021-05-22 02:40:06,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-05-22 02:40:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 3875. [2021-05-22 02:40:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.593959731543624) internal successors, (17797), 3874 states have internal predecessors, (17797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17797 transitions. [2021-05-22 02:40:06,615 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17797 transitions. Word has length 27 [2021-05-22 02:40:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:06,617 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17797 transitions. [2021-05-22 02:40:06,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17797 transitions. [2021-05-22 02:40:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:40:06,634 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:06,634 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:06,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:40:06,635 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:06,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 469094076, now seen corresponding path program 2 times [2021-05-22 02:40:06,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:06,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519060130] [2021-05-22 02:40:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:06,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:06,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519060130] [2021-05-22 02:40:06,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519060130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:06,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:06,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:06,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465982504] [2021-05-22 02:40:06,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:06,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:06,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:06,718 INFO L87 Difference]: Start difference. First operand 3875 states and 17797 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:06,817 INFO L93 Difference]: Finished difference Result 4814 states and 21965 transitions. [2021-05-22 02:40:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:06,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:40:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:06,859 INFO L225 Difference]: With dead ends: 4814 [2021-05-22 02:40:06,860 INFO L226 Difference]: Without dead ends: 3427 [2021-05-22 02:40:06,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-05-22 02:40:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2021-05-22 02:40:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.5128429655575015) internal successors, (15461), 3426 states have internal predecessors, (15461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 15461 transitions. [2021-05-22 02:40:07,026 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 15461 transitions. Word has length 27 [2021-05-22 02:40:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:07,028 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 15461 transitions. [2021-05-22 02:40:07,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:07,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 15461 transitions. [2021-05-22 02:40:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:40:07,040 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:07,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:07,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:40:07,041 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1867001510, now seen corresponding path program 3 times [2021-05-22 02:40:07,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:07,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782449897] [2021-05-22 02:40:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:07,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:07,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782449897] [2021-05-22 02:40:07,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782449897] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:07,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:07,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:40:07,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040113969] [2021-05-22 02:40:07,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:40:07,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:07,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:40:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:07,153 INFO L87 Difference]: Start difference. First operand 3427 states and 15461 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:07,409 INFO L93 Difference]: Finished difference Result 13141 states and 59505 transitions. [2021-05-22 02:40:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:40:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:40:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:07,480 INFO L225 Difference]: With dead ends: 13141 [2021-05-22 02:40:07,480 INFO L226 Difference]: Without dead ends: 9627 [2021-05-22 02:40:07,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:07,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-05-22 02:40:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 3610. [2021-05-22 02:40:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 4.5259074535882515) internal successors, (16334), 3609 states have internal predecessors, (16334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 16334 transitions. [2021-05-22 02:40:07,764 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 16334 transitions. Word has length 27 [2021-05-22 02:40:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:07,765 INFO L482 AbstractCegarLoop]: Abstraction has 3610 states and 16334 transitions. [2021-05-22 02:40:07,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 16334 transitions. [2021-05-22 02:40:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:40:07,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:07,780 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:07,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:40:07,780 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 261207968, now seen corresponding path program 4 times [2021-05-22 02:40:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:07,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409878621] [2021-05-22 02:40:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:07,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:07,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409878621] [2021-05-22 02:40:07,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409878621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:07,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:07,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:07,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150301886] [2021-05-22 02:40:07,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:07,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:07,878 INFO L87 Difference]: Start difference. First operand 3610 states and 16334 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:07,928 INFO L93 Difference]: Finished difference Result 4293 states and 19350 transitions. [2021-05-22 02:40:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:07,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:40:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:07,944 INFO L225 Difference]: With dead ends: 4293 [2021-05-22 02:40:07,944 INFO L226 Difference]: Without dead ends: 3354 [2021-05-22 02:40:07,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-05-22 02:40:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3354. [2021-05-22 02:40:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 4.470623322397853) internal successors, (14990), 3353 states have internal predecessors, (14990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 14990 transitions. [2021-05-22 02:40:08,103 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 14990 transitions. Word has length 27 [2021-05-22 02:40:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:08,103 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 14990 transitions. [2021-05-22 02:40:08,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 14990 transitions. [2021-05-22 02:40:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:08,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:08,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:08,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:40:08,114 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1411704984, now seen corresponding path program 1 times [2021-05-22 02:40:08,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:08,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685187912] [2021-05-22 02:40:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:08,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:08,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685187912] [2021-05-22 02:40:08,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685187912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:08,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434720981] [2021-05-22 02:40:08,168 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 [2021-05-22 02:40:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:40:08,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434720981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:08,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:08,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-22 02:40:08,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073285524] [2021-05-22 02:40:08,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:40:08,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:08,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:40:08,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:40:08,397 INFO L87 Difference]: Start difference. First operand 3354 states and 14990 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:08,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:08,514 INFO L93 Difference]: Finished difference Result 6670 states and 29656 transitions. [2021-05-22 02:40:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:40:08,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:08,544 INFO L225 Difference]: With dead ends: 6670 [2021-05-22 02:40:08,544 INFO L226 Difference]: Without dead ends: 6670 [2021-05-22 02:40:08,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:40:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2021-05-22 02:40:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4206. [2021-05-22 02:40:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 4.520332936979786) internal successors, (19008), 4205 states have internal predecessors, (19008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 19008 transitions. [2021-05-22 02:40:08,841 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 19008 transitions. Word has length 29 [2021-05-22 02:40:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:08,842 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 19008 transitions. [2021-05-22 02:40:08,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 19008 transitions. [2021-05-22 02:40:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:08,904 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:08,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:09,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:09,106 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash 279001500, now seen corresponding path program 1 times [2021-05-22 02:40:09,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:09,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332790839] [2021-05-22 02:40:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:09,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:09,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332790839] [2021-05-22 02:40:09,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332790839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:09,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842118681] [2021-05-22 02:40:09,198 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 [2021-05-22 02:40:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:40:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:09,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842118681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:09,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-22 02:40:09,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-05-22 02:40:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720853342] [2021-05-22 02:40:09,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:09,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:09,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:09,315 INFO L87 Difference]: Start difference. First operand 4206 states and 19008 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:09,401 INFO L93 Difference]: Finished difference Result 5618 states and 25299 transitions. [2021-05-22 02:40:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:09,428 INFO L225 Difference]: With dead ends: 5618 [2021-05-22 02:40:09,428 INFO L226 Difference]: Without dead ends: 5418 [2021-05-22 02:40:09,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:40:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-05-22 02:40:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4426. [2021-05-22 02:40:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 4.55864406779661) internal successors, (20172), 4425 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 20172 transitions. [2021-05-22 02:40:09,685 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 20172 transitions. Word has length 29 [2021-05-22 02:40:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:09,685 INFO L482 AbstractCegarLoop]: Abstraction has 4426 states and 20172 transitions. [2021-05-22 02:40:09,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 20172 transitions. [2021-05-22 02:40:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:09,699 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:09,699 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:09,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:09,922 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash -614649962, now seen corresponding path program 1 times [2021-05-22 02:40:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:09,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110134468] [2021-05-22 02:40:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:09,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:09,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110134468] [2021-05-22 02:40:09,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110134468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:09,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:09,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:09,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729543402] [2021-05-22 02:40:09,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:09,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:09,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:09,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:09,949 INFO L87 Difference]: Start difference. First operand 4426 states and 20172 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:10,110 INFO L93 Difference]: Finished difference Result 7946 states and 35321 transitions. [2021-05-22 02:40:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:10,139 INFO L225 Difference]: With dead ends: 7946 [2021-05-22 02:40:10,140 INFO L226 Difference]: Without dead ends: 7848 [2021-05-22 02:40:10,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-05-22 02:40:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 6434. [2021-05-22 02:40:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 4.542048810819214) internal successors, (29219), 6433 states have internal predecessors, (29219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 29219 transitions. [2021-05-22 02:40:10,362 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 29219 transitions. Word has length 29 [2021-05-22 02:40:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:10,363 INFO L482 AbstractCegarLoop]: Abstraction has 6434 states and 29219 transitions. [2021-05-22 02:40:10,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 29219 transitions. [2021-05-22 02:40:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:10,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:10,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:10,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:40:10,382 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -970617380, now seen corresponding path program 1 times [2021-05-22 02:40:10,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:10,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712516854] [2021-05-22 02:40:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:10,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:10,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712516854] [2021-05-22 02:40:10,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712516854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:10,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:10,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:10,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845443923] [2021-05-22 02:40:10,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:10,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:10,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:10,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:10,430 INFO L87 Difference]: Start difference. First operand 6434 states and 29219 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:10,542 INFO L93 Difference]: Finished difference Result 11319 states and 50308 transitions. [2021-05-22 02:40:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:10,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:10,580 INFO L225 Difference]: With dead ends: 11319 [2021-05-22 02:40:10,581 INFO L226 Difference]: Without dead ends: 11198 [2021-05-22 02:40:10,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2021-05-22 02:40:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 8925. [2021-05-22 02:40:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 4.6001792917974) internal successors, (41052), 8924 states have internal predecessors, (41052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 41052 transitions. [2021-05-22 02:40:11,004 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 41052 transitions. Word has length 29 [2021-05-22 02:40:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:11,004 INFO L482 AbstractCegarLoop]: Abstraction has 8925 states and 41052 transitions. [2021-05-22 02:40:11,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 41052 transitions. [2021-05-22 02:40:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:11,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:11,030 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:11,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:40:11,031 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash -643441376, now seen corresponding path program 2 times [2021-05-22 02:40:11,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:11,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587257945] [2021-05-22 02:40:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:11,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:11,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587257945] [2021-05-22 02:40:11,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587257945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:11,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223572896] [2021-05-22 02:40:11,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:11,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:40:11,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:11,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:40:11,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:11,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223572896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:11,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:11,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-05-22 02:40:11,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381766269] [2021-05-22 02:40:11,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:40:11,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:40:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:11,253 INFO L87 Difference]: Start difference. First operand 8925 states and 41052 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:12,050 INFO L93 Difference]: Finished difference Result 31957 states and 138250 transitions. [2021-05-22 02:40:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:40:12,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:12,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:12,132 INFO L225 Difference]: With dead ends: 31957 [2021-05-22 02:40:12,132 INFO L226 Difference]: Without dead ends: 25190 [2021-05-22 02:40:12,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:40:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25190 states. [2021-05-22 02:40:12,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25190 to 11186. [2021-05-22 02:40:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11186 states, 11185 states have (on average 4.569959767545821) internal successors, (51115), 11185 states have internal predecessors, (51115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 51115 transitions. [2021-05-22 02:40:12,738 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 51115 transitions. Word has length 29 [2021-05-22 02:40:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:12,738 INFO L482 AbstractCegarLoop]: Abstraction has 11186 states and 51115 transitions. [2021-05-22 02:40:12,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 51115 transitions. [2021-05-22 02:40:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:12,761 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:12,761 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:12,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:12,966 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash 896103960, now seen corresponding path program 2 times [2021-05-22 02:40:12,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:12,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152945081] [2021-05-22 02:40:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:12,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:12,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152945081] [2021-05-22 02:40:12,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152945081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:12,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:12,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:12,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853591442] [2021-05-22 02:40:13,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:13,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:13,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:13,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:13,000 INFO L87 Difference]: Start difference. First operand 11186 states and 51115 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:13,252 INFO L93 Difference]: Finished difference Result 13521 states and 60589 transitions. [2021-05-22 02:40:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:13,294 INFO L225 Difference]: With dead ends: 13521 [2021-05-22 02:40:13,295 INFO L226 Difference]: Without dead ends: 13281 [2021-05-22 02:40:13,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2021-05-22 02:40:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 11164. [2021-05-22 02:40:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11164 states, 11163 states have (on average 4.55361461972588) internal successors, (50832), 11163 states have internal predecessors, (50832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11164 states to 11164 states and 50832 transitions. [2021-05-22 02:40:13,621 INFO L78 Accepts]: Start accepts. Automaton has 11164 states and 50832 transitions. Word has length 29 [2021-05-22 02:40:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:13,621 INFO L482 AbstractCegarLoop]: Abstraction has 11164 states and 50832 transitions. [2021-05-22 02:40:13,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 11164 states and 50832 transitions. [2021-05-22 02:40:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:13,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:13,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:13,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:40:13,646 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash 644421402, now seen corresponding path program 2 times [2021-05-22 02:40:13,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:13,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676186957] [2021-05-22 02:40:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:13,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:13,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676186957] [2021-05-22 02:40:13,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676186957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:13,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:13,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:13,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634683051] [2021-05-22 02:40:13,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:13,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:13,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:13,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:13,668 INFO L87 Difference]: Start difference. First operand 11164 states and 50832 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:13,770 INFO L93 Difference]: Finished difference Result 12568 states and 55860 transitions. [2021-05-22 02:40:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:40:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:13,804 INFO L225 Difference]: With dead ends: 12568 [2021-05-22 02:40:13,804 INFO L226 Difference]: Without dead ends: 12568 [2021-05-22 02:40:13,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12568 states. [2021-05-22 02:40:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12568 to 10980. [2021-05-22 02:40:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 4.559340559249477) internal successors, (50057), 10979 states have internal predecessors, (50057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 50057 transitions. [2021-05-22 02:40:14,271 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 50057 transitions. Word has length 29 [2021-05-22 02:40:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:14,271 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 50057 transitions. [2021-05-22 02:40:14,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 50057 transitions. [2021-05-22 02:40:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:14,293 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:14,293 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:14,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:40:14,293 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:14,294 INFO L82 PathProgramCache]: Analyzing trace with hash -759097254, now seen corresponding path program 3 times [2021-05-22 02:40:14,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:14,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327147224] [2021-05-22 02:40:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:14,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327147224] [2021-05-22 02:40:14,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327147224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:14,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:14,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:14,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702261895] [2021-05-22 02:40:14,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:14,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:14,316 INFO L87 Difference]: Start difference. First operand 10980 states and 50057 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:14,429 INFO L93 Difference]: Finished difference Result 13957 states and 62115 transitions. [2021-05-22 02:40:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:40:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:14,480 INFO L225 Difference]: With dead ends: 13957 [2021-05-22 02:40:14,480 INFO L226 Difference]: Without dead ends: 13957 [2021-05-22 02:40:14,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13957 states. [2021-05-22 02:40:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13957 to 11348. [2021-05-22 02:40:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11348 states, 11347 states have (on average 4.560324314796863) internal successors, (51746), 11347 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11348 states to 11348 states and 51746 transitions. [2021-05-22 02:40:14,970 INFO L78 Accepts]: Start accepts. Automaton has 11348 states and 51746 transitions. Word has length 29 [2021-05-22 02:40:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:14,971 INFO L482 AbstractCegarLoop]: Abstraction has 11348 states and 51746 transitions. [2021-05-22 02:40:14,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 11348 states and 51746 transitions. [2021-05-22 02:40:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:14,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:14,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:14,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:40:14,993 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1350465982, now seen corresponding path program 4 times [2021-05-22 02:40:14,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:14,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812760260] [2021-05-22 02:40:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:15,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:15,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812760260] [2021-05-22 02:40:15,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812760260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:15,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:15,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:40:15,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666990257] [2021-05-22 02:40:15,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:40:15,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:15,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:40:15,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:15,022 INFO L87 Difference]: Start difference. First operand 11348 states and 51746 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:15,132 INFO L93 Difference]: Finished difference Result 15992 states and 69373 transitions. [2021-05-22 02:40:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:15,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:15,176 INFO L225 Difference]: With dead ends: 15992 [2021-05-22 02:40:15,176 INFO L226 Difference]: Without dead ends: 15751 [2021-05-22 02:40:15,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2021-05-22 02:40:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 11284. [2021-05-22 02:40:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 11283 states have (on average 4.5284055658955955) internal successors, (51094), 11283 states have internal predecessors, (51094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 51094 transitions. [2021-05-22 02:40:15,676 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 51094 transitions. Word has length 29 [2021-05-22 02:40:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:15,677 INFO L482 AbstractCegarLoop]: Abstraction has 11284 states and 51094 transitions. [2021-05-22 02:40:15,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 51094 transitions. [2021-05-22 02:40:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:15,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:15,706 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:15,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:40:15,706 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1688009984, now seen corresponding path program 2 times [2021-05-22 02:40:15,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:15,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812202450] [2021-05-22 02:40:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:15,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:15,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812202450] [2021-05-22 02:40:15,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812202450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:15,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304732038] [2021-05-22 02:40:15,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:40:15,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:40:15,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:15,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:40:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:15,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304732038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:15,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:15,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-05-22 02:40:15,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551426336] [2021-05-22 02:40:15,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:40:15,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:40:15,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:15,891 INFO L87 Difference]: Start difference. First operand 11284 states and 51094 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:16,826 INFO L93 Difference]: Finished difference Result 34532 states and 153051 transitions. [2021-05-22 02:40:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:40:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:17,029 INFO L225 Difference]: With dead ends: 34532 [2021-05-22 02:40:17,029 INFO L226 Difference]: Without dead ends: 15158 [2021-05-22 02:40:17,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:40:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15158 states. [2021-05-22 02:40:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15158 to 6407. [2021-05-22 02:40:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 6406 states have (on average 4.431002185451139) internal successors, (28385), 6406 states have internal predecessors, (28385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 28385 transitions. [2021-05-22 02:40:17,254 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 28385 transitions. Word has length 29 [2021-05-22 02:40:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:17,254 INFO L482 AbstractCegarLoop]: Abstraction has 6407 states and 28385 transitions. [2021-05-22 02:40:17,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 28385 transitions. [2021-05-22 02:40:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:17,270 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:17,270 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:17,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:17,473 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1375793184, now seen corresponding path program 3 times [2021-05-22 02:40:17,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:17,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883534490] [2021-05-22 02:40:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:17,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:17,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883534490] [2021-05-22 02:40:17,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883534490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:17,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:17,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:17,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867586995] [2021-05-22 02:40:17,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:17,500 INFO L87 Difference]: Start difference. First operand 6407 states and 28385 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:17,564 INFO L93 Difference]: Finished difference Result 6967 states and 30444 transitions. [2021-05-22 02:40:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:17,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:17,581 INFO L225 Difference]: With dead ends: 6967 [2021-05-22 02:40:17,582 INFO L226 Difference]: Without dead ends: 6541 [2021-05-22 02:40:17,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:17,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2021-05-22 02:40:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 5575. [2021-05-22 02:40:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.463939720129171) internal successors, (24882), 5574 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 24882 transitions. [2021-05-22 02:40:17,713 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 24882 transitions. Word has length 29 [2021-05-22 02:40:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:17,713 INFO L482 AbstractCegarLoop]: Abstraction has 5575 states and 24882 transitions. [2021-05-22 02:40:17,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 24882 transitions. [2021-05-22 02:40:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:17,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:17,723 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:17,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:40:17,724 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1588380738, now seen corresponding path program 5 times [2021-05-22 02:40:17,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:17,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677286709] [2021-05-22 02:40:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:17,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:17,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677286709] [2021-05-22 02:40:17,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677286709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:17,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:17,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:40:17,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881284087] [2021-05-22 02:40:17,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:40:17,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:17,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:40:17,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:17,753 INFO L87 Difference]: Start difference. First operand 5575 states and 24882 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:17,829 INFO L93 Difference]: Finished difference Result 5778 states and 25550 transitions. [2021-05-22 02:40:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:40:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:40:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:17,843 INFO L225 Difference]: With dead ends: 5778 [2021-05-22 02:40:17,843 INFO L226 Difference]: Without dead ends: 5413 [2021-05-22 02:40:17,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:40:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-05-22 02:40:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 5186. [2021-05-22 02:40:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 5185 states have (on average 4.515911282545805) internal successors, (23415), 5185 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 23415 transitions. [2021-05-22 02:40:17,963 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 23415 transitions. Word has length 29 [2021-05-22 02:40:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:17,963 INFO L482 AbstractCegarLoop]: Abstraction has 5186 states and 23415 transitions. [2021-05-22 02:40:17,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 23415 transitions. [2021-05-22 02:40:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:40:17,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:17,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:17,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:40:17,975 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:17,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1089947996, now seen corresponding path program 1 times [2021-05-22 02:40:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:17,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926743037] [2021-05-22 02:40:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:18,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:18,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926743037] [2021-05-22 02:40:18,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926743037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:18,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472831030] [2021-05-22 02:40:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:40:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:40:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472831030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:18,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:18,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 10 [2021-05-22 02:40:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307049149] [2021-05-22 02:40:18,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:40:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:40:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:40:18,183 INFO L87 Difference]: Start difference. First operand 5186 states and 23415 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:19,155 INFO L93 Difference]: Finished difference Result 18525 states and 84293 transitions. [2021-05-22 02:40:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:40:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-22 02:40:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:19,184 INFO L225 Difference]: With dead ends: 18525 [2021-05-22 02:40:19,185 INFO L226 Difference]: Without dead ends: 11569 [2021-05-22 02:40:19,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:40:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2021-05-22 02:40:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 6899. [2021-05-22 02:40:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6898 states have (on average 4.447521020585677) internal successors, (30679), 6898 states have internal predecessors, (30679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30679 transitions. [2021-05-22 02:40:19,356 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30679 transitions. Word has length 33 [2021-05-22 02:40:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:19,356 INFO L482 AbstractCegarLoop]: Abstraction has 6899 states and 30679 transitions. [2021-05-22 02:40:19,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30679 transitions. [2021-05-22 02:40:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:40:19,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:19,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:19,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:40:19,594 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:19,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2087262130, now seen corresponding path program 1 times [2021-05-22 02:40:19,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:19,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178638950] [2021-05-22 02:40:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:40:19,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:19,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178638950] [2021-05-22 02:40:19,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178638950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:19,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264612785] [2021-05-22 02:40:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:19,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:40:19,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:19,749 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:40:19,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:40:19,951 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:40:19,954 INFO L168 Benchmark]: Toolchain (without parser) took 15167.41 ms. Allocated memory was 360.7 MB in the beginning and 10.2 GB in the end (delta: 9.8 GB). Free memory was 340.7 MB in the beginning and 9.1 GB in the end (delta: -8.7 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-05-22 02:40:19,954 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 360.7 MB. Free memory was 341.9 MB in the beginning and 341.9 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:40:19,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.30 ms. Allocated memory is still 360.7 MB. Free memory was 340.6 MB in the beginning and 339.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:40:19,954 INFO L168 Benchmark]: Boogie Preprocessor took 16.64 ms. Allocated memory is still 360.7 MB. Free memory was 339.1 MB in the beginning and 338.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:40:19,954 INFO L168 Benchmark]: RCFGBuilder took 250.67 ms. Allocated memory is still 360.7 MB. Free memory was 338.0 MB in the beginning and 323.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:40:19,954 INFO L168 Benchmark]: TraceAbstraction took 14872.35 ms. Allocated memory was 360.7 MB in the beginning and 10.2 GB in the end (delta: 9.8 GB). Free memory was 322.6 MB in the beginning and 9.1 GB in the end (delta: -8.8 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-05-22 02:40:19,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 360.7 MB. Free memory was 341.9 MB in the beginning and 341.9 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.30 ms. Allocated memory is still 360.7 MB. Free memory was 340.6 MB in the beginning and 339.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.64 ms. Allocated memory is still 360.7 MB. Free memory was 339.1 MB in the beginning and 338.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 250.67 ms. Allocated memory is still 360.7 MB. Free memory was 338.0 MB in the beginning and 323.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 14872.35 ms. Allocated memory was 360.7 MB in the beginning and 10.2 GB in the end (delta: 9.8 GB). Free memory was 322.6 MB in the beginning and 9.1 GB in the end (delta: -8.8 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...