/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:48:49,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:48:49,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:48:49,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:48:49,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:48:49,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:48:49,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:48:49,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:48:49,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:48:49,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:48:49,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:48:49,921 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:48:49,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:48:49,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:48:49,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:48:49,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:48:49,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:48:49,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:48:49,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:48:49,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:48:49,923 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:48:49,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:48:49,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:48:49,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:48:49,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:48:49,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:48:49,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:48:49,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:48:49,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:48:49,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:48:49,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:48:49,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:48:49,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:48:49,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:48:49,931 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:48:49,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:48:49,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:48:50,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:48:50,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:48:50,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:48:50,292 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:48:50,295 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:48:50,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2021-07-13 19:48:50,296 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-07-13 19:48:50,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:48:50,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:48:50,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:48:50,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:48:50,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:48:50,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:48:50,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:48:50,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:48:50,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:48:50,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... [2021-07-13 19:48:50,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:48:50,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:48:50,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:48:50,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:48:50,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:48:50,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:48:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:48:50,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:48:50,474 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:48:50,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:48:50,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:48:50,474 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:48:50,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:48:50,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:48:50,475 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:48:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:48:50,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:48:50,476 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 19:48:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 19:48:50,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 19:48:50,477 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-13 19:48:50,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-13 19:48:50,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-13 19:48:50,478 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:48:50,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:48:50,724 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:48:50,736 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:48:50 BoogieIcfgContainer [2021-07-13 19:48:50,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:48:50,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:48:50,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:48:50,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:48:50,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:48:50" (1/2) ... [2021-07-13 19:48:50,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5921241a and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:48:50, skipping insertion in model container [2021-07-13 19:48:50,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:48:50" (2/2) ... [2021-07-13 19:48:50,743 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-07-13 19:48:50,747 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:48:50,747 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:48:50,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:48:50,748 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:48:50,816 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-07-13 19:48:50,835 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-07-13 19:48:50,867 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:48:50,867 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:48:50,867 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:48:50,867 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:48:50,867 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:48:50,867 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:48:50,868 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:48:50,868 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:48:50,889 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-07-13 19:48:51,159 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:48:51,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:51,251 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:51,251 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:51,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-07-13 19:48:51,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:51,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510162712] [2021-07-13 19:48:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:51,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:51,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510162712] [2021-07-13 19:48:51,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510162712] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:48:51,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:48:51,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:48:51,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000036631] [2021-07-13 19:48:51,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:48:51,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:51,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:48:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:48:51,452 INFO L87 Difference]: Start difference. First operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 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) [2021-07-13 19:48:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:52,086 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-07-13 19:48:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:48:52,088 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 [2021-07-13 19:48:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:52,444 INFO L225 Difference]: With dead ends: 23171 [2021-07-13 19:48:52,444 INFO L226 Difference]: Without dead ends: 15763 [2021-07-13 19:48:52,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:48:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-07-13 19:48:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-07-13 19:48:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-07-13 19:48:53,158 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-07-13 19:48:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:53,159 INFO L482 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-07-13 19:48:53,159 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) [2021-07-13 19:48:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-07-13 19:48:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:48:53,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:53,192 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:53,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:48:53,193 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-07-13 19:48:53,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:53,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586174711] [2021-07-13 19:48:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:53,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:53,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586174711] [2021-07-13 19:48:53,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586174711] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:48:53,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:48:53,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:48:53,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590951676] [2021-07-13 19:48:53,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:48:53,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:53,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:48:53,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:48:53,268 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 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) [2021-07-13 19:48:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:53,514 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-07-13 19:48:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:48:53,514 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 [2021-07-13 19:48:53,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:53,561 INFO L225 Difference]: With dead ends: 9446 [2021-07-13 19:48:53,561 INFO L226 Difference]: Without dead ends: 6583 [2021-07-13 19:48:53,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:48:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-07-13 19:48:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-07-13 19:48:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-07-13 19:48:53,934 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-07-13 19:48:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:53,935 INFO L482 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-07-13 19:48:53,935 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) [2021-07-13 19:48:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-07-13 19:48:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:48:53,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:53,964 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:53,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:48:53,964 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-07-13 19:48:53,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:53,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19764164] [2021-07-13 19:48:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:54,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:54,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19764164] [2021-07-13 19:48:54,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19764164] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:48:54,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:48:54,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:48:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212715238] [2021-07-13 19:48:54,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:48:54,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:54,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:48:54,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:48:54,038 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 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) [2021-07-13 19:48:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:54,528 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-07-13 19:48:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:48:54,529 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 [2021-07-13 19:48:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:54,666 INFO L225 Difference]: With dead ends: 22801 [2021-07-13 19:48:54,667 INFO L226 Difference]: Without dead ends: 16593 [2021-07-13 19:48:54,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:48:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-07-13 19:48:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-07-13 19:48:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-07-13 19:48:55,223 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-07-13 19:48:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:55,223 INFO L482 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-07-13 19:48:55,223 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) [2021-07-13 19:48:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-07-13 19:48:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:48:55,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:55,254 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:55,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:48:55,255 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:55,255 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-07-13 19:48:55,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:55,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324039898] [2021-07-13 19:48:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:55,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324039898] [2021-07-13 19:48:55,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324039898] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:48:55,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:48:55,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:48:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392340463] [2021-07-13 19:48:55,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:48:55,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:48:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:48:55,303 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 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) [2021-07-13 19:48:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:55,389 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-07-13 19:48:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:48:55,390 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 [2021-07-13 19:48:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:55,446 INFO L225 Difference]: With dead ends: 8424 [2021-07-13 19:48:55,446 INFO L226 Difference]: Without dead ends: 6361 [2021-07-13 19:48:55,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:48:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-07-13 19:48:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-07-13 19:48:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-07-13 19:48:55,810 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-07-13 19:48:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:55,810 INFO L482 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-07-13 19:48:55,810 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) [2021-07-13 19:48:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-07-13 19:48:55,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:48:55,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:55,830 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:55,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:48:55,831 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-07-13 19:48:55,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:55,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443796284] [2021-07-13 19:48:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:55,992 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 19:48:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:56,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:56,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443796284] [2021-07-13 19:48:56,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443796284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:56,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284812550] [2021-07-13 19:48:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:56,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:48:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:56,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284812550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:56,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:56,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 19:48:56,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700065848] [2021-07-13 19:48:56,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:48:56,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:56,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:48:56,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:48:56,393 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:56,559 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-07-13 19:48:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:48:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:48:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:56,665 INFO L225 Difference]: With dead ends: 13742 [2021-07-13 19:48:56,665 INFO L226 Difference]: Without dead ends: 13742 [2021-07-13 19:48:56,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:48:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-07-13 19:48:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-07-13 19:48:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-07-13 19:48:57,438 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-07-13 19:48:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:57,438 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-07-13 19:48:57,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-07-13 19:48:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:48:57,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:57,481 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:57,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:57,697 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-07-13 19:48:57,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:57,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393945593] [2021-07-13 19:48:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:57,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393945593] [2021-07-13 19:48:57,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393945593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329600737] [2021-07-13 19:48:57,820 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 [2021-07-13 19:48:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:57,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:48:57,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:57,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329600737] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:48:57,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:48:57,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-07-13 19:48:57,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673503317] [2021-07-13 19:48:57,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:48:57,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:57,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:48:57,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:48:57,952 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:58,105 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-07-13 19:48:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:48:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:48:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:58,179 INFO L225 Difference]: With dead ends: 11412 [2021-07-13 19:48:58,179 INFO L226 Difference]: Without dead ends: 11118 [2021-07-13 19:48:58,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:48:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-07-13 19:48:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-07-13 19:48:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-07-13 19:48:58,647 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-07-13 19:48:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:58,648 INFO L482 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-07-13 19:48:58,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-07-13 19:48:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:48:58,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:58,675 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:58,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:58,889 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:58,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1493139564, now seen corresponding path program 1 times [2021-07-13 19:48:58,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:58,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254084271] [2021-07-13 19:48:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:58,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254084271] [2021-07-13 19:48:58,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254084271] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:48:58,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:48:58,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:48:58,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65391757] [2021-07-13 19:48:58,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:48:58,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:58,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:48:58,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:48:58,921 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:59,198 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-07-13 19:48:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:48:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:48:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:59,275 INFO L225 Difference]: With dead ends: 15516 [2021-07-13 19:48:59,276 INFO L226 Difference]: Without dead ends: 15386 [2021-07-13 19:48:59,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:48:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-07-13 19:48:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-07-13 19:48:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-07-13 19:48:59,847 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-07-13 19:48:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:59,847 INFO L482 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-07-13 19:48:59,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-07-13 19:48:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:48:59,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:59,889 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:59,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:48:59,890 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:48:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-07-13 19:48:59,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:59,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279689412] [2021-07-13 19:48:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:59,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279689412] [2021-07-13 19:48:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279689412] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:48:59,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:48:59,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:48:59,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061920905] [2021-07-13 19:48:59,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:48:59,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:48:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:48:59,913 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:00,116 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-07-13 19:49:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:49:00,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:00,406 INFO L225 Difference]: With dead ends: 22857 [2021-07-13 19:49:00,408 INFO L226 Difference]: Without dead ends: 22667 [2021-07-13 19:49:00,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-07-13 19:49:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-07-13 19:49:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-07-13 19:49:01,208 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-07-13 19:49:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:01,208 INFO L482 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-07-13 19:49:01,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-07-13 19:49:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:49:01,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:01,250 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:01,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:49:01,251 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:01,251 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-07-13 19:49:01,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:01,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461350348] [2021-07-13 19:49:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:01,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:01,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461350348] [2021-07-13 19:49:01,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461350348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:01,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502341000] [2021-07-13 19:49:01,312 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 [2021-07-13 19:49:01,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:49:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:01,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502341000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:01,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:01,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-07-13 19:49:01,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850351037] [2021-07-13 19:49:01,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:49:01,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:01,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:49:01,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:49:01,452 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:03,031 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-07-13 19:49:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:49:03,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:03,272 INFO L225 Difference]: With dead ends: 64631 [2021-07-13 19:49:03,272 INFO L226 Difference]: Without dead ends: 50671 [2021-07-13 19:49:03,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:49:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-07-13 19:49:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-07-13 19:49:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-07-13 19:49:04,555 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-07-13 19:49:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:04,556 INFO L482 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-07-13 19:49:04,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-07-13 19:49:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:49:04,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:04,857 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:05,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:05,077 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-07-13 19:49:05,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:05,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127456881] [2021-07-13 19:49:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:05,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:05,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127456881] [2021-07-13 19:49:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127456881] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:49:05,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:49:05,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:49:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987503822] [2021-07-13 19:49:05,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:49:05,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:49:05,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:49:05,108 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:05,322 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-07-13 19:49:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:49:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:05,425 INFO L225 Difference]: With dead ends: 27166 [2021-07-13 19:49:05,425 INFO L226 Difference]: Without dead ends: 26834 [2021-07-13 19:49:05,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-07-13 19:49:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-07-13 19:49:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-07-13 19:49:06,434 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-07-13 19:49:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:06,434 INFO L482 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-07-13 19:49:06,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-07-13 19:49:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:49:06,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:06,502 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:06,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:49:06,503 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:06,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1971177000, now seen corresponding path program 2 times [2021-07-13 19:49:06,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:06,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071249924] [2021-07-13 19:49:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:06,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:06,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071249924] [2021-07-13 19:49:06,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071249924] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:49:06,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:49:06,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:49:06,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584879014] [2021-07-13 19:49:06,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:49:06,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:49:06,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:49:06,527 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:06,774 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-07-13 19:49:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:49:06,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:06,869 INFO L225 Difference]: With dead ends: 24325 [2021-07-13 19:49:06,869 INFO L226 Difference]: Without dead ends: 24325 [2021-07-13 19:49:06,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:49:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-07-13 19:49:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-07-13 19:49:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-07-13 19:49:07,755 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-07-13 19:49:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-07-13 19:49:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-07-13 19:49:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:49:07,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:07,799 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:07,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 19:49:07,799 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:07,799 INFO L82 PathProgramCache]: Analyzing trace with hash -951852602, now seen corresponding path program 3 times [2021-07-13 19:49:07,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:07,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853808744] [2021-07-13 19:49:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:07,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853808744] [2021-07-13 19:49:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853808744] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:49:07,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:49:07,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:49:07,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491711588] [2021-07-13 19:49:07,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:49:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:49:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:07,834 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:08,007 INFO L93 Difference]: Finished difference Result 22070 states and 97895 transitions. [2021-07-13 19:49:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:49:08,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:08,072 INFO L225 Difference]: With dead ends: 22070 [2021-07-13 19:49:08,073 INFO L226 Difference]: Without dead ends: 19364 [2021-07-13 19:49:08,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19364 states. [2021-07-13 19:49:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19364 to 13869. [2021-07-13 19:49:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13869 states, 13868 states have (on average 4.429838477069513) internal successors, (61433), 13868 states have internal predecessors, (61433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13869 states to 13869 states and 61433 transitions. [2021-07-13 19:49:08,609 INFO L78 Accepts]: Start accepts. Automaton has 13869 states and 61433 transitions. Word has length 30 [2021-07-13 19:49:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:08,609 INFO L482 AbstractCegarLoop]: Abstraction has 13869 states and 61433 transitions. [2021-07-13 19:49:08,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states and 61433 transitions. [2021-07-13 19:49:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:49:08,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:08,641 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:08,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:49:08,641 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 372732073, now seen corresponding path program 2 times [2021-07-13 19:49:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:08,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717330389] [2021-07-13 19:49:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:08,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:08,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717330389] [2021-07-13 19:49:08,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717330389] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:49:08,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:49:08,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:49:08,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138992016] [2021-07-13 19:49:08,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:49:08,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:49:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:49:08,671 INFO L87 Difference]: Start difference. First operand 13869 states and 61433 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:09,089 INFO L93 Difference]: Finished difference Result 20880 states and 90831 transitions. [2021-07-13 19:49:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:49:09,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:09,163 INFO L225 Difference]: With dead ends: 20880 [2021-07-13 19:49:09,163 INFO L226 Difference]: Without dead ends: 20521 [2021-07-13 19:49:09,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20521 states. [2021-07-13 19:49:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20521 to 15337. [2021-07-13 19:49:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15337 states, 15336 states have (on average 4.414906103286385) internal successors, (67707), 15336 states have internal predecessors, (67707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15337 states to 15337 states and 67707 transitions. [2021-07-13 19:49:09,758 INFO L78 Accepts]: Start accepts. Automaton has 15337 states and 67707 transitions. Word has length 30 [2021-07-13 19:49:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:09,758 INFO L482 AbstractCegarLoop]: Abstraction has 15337 states and 67707 transitions. [2021-07-13 19:49:09,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15337 states and 67707 transitions. [2021-07-13 19:49:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:49:09,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:09,794 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:09,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:49:09,794 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1635860811, now seen corresponding path program 3 times [2021-07-13 19:49:09,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:09,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595369494] [2021-07-13 19:49:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:09,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:09,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595369494] [2021-07-13 19:49:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595369494] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:49:09,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:49:09,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:49:09,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5225988] [2021-07-13 19:49:09,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:49:09,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:49:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:09,838 INFO L87 Difference]: Start difference. First operand 15337 states and 67707 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:09,974 INFO L93 Difference]: Finished difference Result 17706 states and 77875 transitions. [2021-07-13 19:49:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:49:09,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:10,023 INFO L225 Difference]: With dead ends: 17706 [2021-07-13 19:49:10,023 INFO L226 Difference]: Without dead ends: 15604 [2021-07-13 19:49:10,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15604 states. [2021-07-13 19:49:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15604 to 13238. [2021-07-13 19:49:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13238 states, 13237 states have (on average 4.481755684822845) internal successors, (59325), 13237 states have internal predecessors, (59325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13238 states to 13238 states and 59325 transitions. [2021-07-13 19:49:10,486 INFO L78 Accepts]: Start accepts. Automaton has 13238 states and 59325 transitions. Word has length 30 [2021-07-13 19:49:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:10,486 INFO L482 AbstractCegarLoop]: Abstraction has 13238 states and 59325 transitions. [2021-07-13 19:49:10,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 13238 states and 59325 transitions. [2021-07-13 19:49:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:49:10,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:10,513 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:10,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 19:49:10,514 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-07-13 19:49:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:10,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525746733] [2021-07-13 19:49:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:10,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:10,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525746733] [2021-07-13 19:49:10,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525746733] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:49:10,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:49:10,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:49:10,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440387868] [2021-07-13 19:49:10,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:49:10,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:10,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:49:10,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:49:10,535 INFO L87 Difference]: Start difference. First operand 13238 states and 59325 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:10,651 INFO L93 Difference]: Finished difference Result 14893 states and 67180 transitions. [2021-07-13 19:49:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:49:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:49:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:10,694 INFO L225 Difference]: With dead ends: 14893 [2021-07-13 19:49:10,694 INFO L226 Difference]: Without dead ends: 13819 [2021-07-13 19:49:10,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:49:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13819 states. [2021-07-13 19:49:11,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13819 to 10861. [2021-07-13 19:49:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 4.560865561694291) internal successors, (49531), 10860 states have internal predecessors, (49531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 49531 transitions. [2021-07-13 19:49:11,096 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 49531 transitions. Word has length 30 [2021-07-13 19:49:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:11,096 INFO L482 AbstractCegarLoop]: Abstraction has 10861 states and 49531 transitions. [2021-07-13 19:49:11,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 49531 transitions. [2021-07-13 19:49:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:49:11,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:11,118 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:11,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-13 19:49:11,118 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2086416251, now seen corresponding path program 1 times [2021-07-13 19:49:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:11,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613994878] [2021-07-13 19:49:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:11,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:11,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613994878] [2021-07-13 19:49:11,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613994878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:11,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631981904] [2021-07-13 19:49:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:11,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:49:11,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:11,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631981904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:11,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:11,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 19:49:11,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580228674] [2021-07-13 19:49:11,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:49:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:49:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:49:11,251 INFO L87 Difference]: Start difference. First operand 10861 states and 49531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:11,407 INFO L93 Difference]: Finished difference Result 16083 states and 73635 transitions. [2021-07-13 19:49:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:49:11,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:49:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:11,669 INFO L225 Difference]: With dead ends: 16083 [2021-07-13 19:49:11,669 INFO L226 Difference]: Without dead ends: 16083 [2021-07-13 19:49:11,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:49:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16083 states. [2021-07-13 19:49:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16083 to 11321. [2021-07-13 19:49:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11321 states, 11320 states have (on average 4.567667844522968) internal successors, (51706), 11320 states have internal predecessors, (51706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11321 states to 11321 states and 51706 transitions. [2021-07-13 19:49:11,981 INFO L78 Accepts]: Start accepts. Automaton has 11321 states and 51706 transitions. Word has length 36 [2021-07-13 19:49:11,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:11,981 INFO L482 AbstractCegarLoop]: Abstraction has 11321 states and 51706 transitions. [2021-07-13 19:49:11,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,981 INFO L276 IsEmpty]: Start isEmpty. Operand 11321 states and 51706 transitions. [2021-07-13 19:49:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:49:12,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:12,004 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:12,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:12,205 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1437310275, now seen corresponding path program 1 times [2021-07-13 19:49:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:12,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981608818] [2021-07-13 19:49:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:12,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:12,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981608818] [2021-07-13 19:49:12,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981608818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:12,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567527495] [2021-07-13 19:49:12,343 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 [2021-07-13 19:49:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:49:12,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:12,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:49:12,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:12,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:12,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:12,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 19:49:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:12,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567527495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:12,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:12,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:49:12,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031558451] [2021-07-13 19:49:12,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:49:12,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:49:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:49:12,525 INFO L87 Difference]: Start difference. First operand 11321 states and 51706 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:12,940 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-07-13 19:49:13,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:13,412 INFO L93 Difference]: Finished difference Result 47246 states and 217897 transitions. [2021-07-13 19:49:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:49:13,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:49:13,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:13,495 INFO L225 Difference]: With dead ends: 47246 [2021-07-13 19:49:13,495 INFO L226 Difference]: Without dead ends: 22406 [2021-07-13 19:49:13,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:49:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22406 states. [2021-07-13 19:49:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22406 to 12265. [2021-07-13 19:49:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12265 states, 12264 states have (on average 4.510437051532942) internal successors, (55316), 12264 states have internal predecessors, (55316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12265 states to 12265 states and 55316 transitions. [2021-07-13 19:49:14,048 INFO L78 Accepts]: Start accepts. Automaton has 12265 states and 55316 transitions. Word has length 39 [2021-07-13 19:49:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:14,049 INFO L482 AbstractCegarLoop]: Abstraction has 12265 states and 55316 transitions. [2021-07-13 19:49:14,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 12265 states and 55316 transitions. [2021-07-13 19:49:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:49:14,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:14,073 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:14,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:49:14,274 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1970346577, now seen corresponding path program 2 times [2021-07-13 19:49:14,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:14,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442920049] [2021-07-13 19:49:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:14,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:14,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442920049] [2021-07-13 19:49:14,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442920049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:14,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901053169] [2021-07-13 19:49:14,401 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:14,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:14,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:49:14,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 19:49:14,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:14,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:14,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:14,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-07-13 19:49:14,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:14,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:14,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:14,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:14,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-13 19:49:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:14,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901053169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:14,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:14,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-13 19:49:14,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140643748] [2021-07-13 19:49:14,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:49:14,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:49:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:49:14,742 INFO L87 Difference]: Start difference. First operand 12265 states and 55316 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:15,456 INFO L93 Difference]: Finished difference Result 44884 states and 205697 transitions. [2021-07-13 19:49:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:49:15,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:49:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:15,772 INFO L225 Difference]: With dead ends: 44884 [2021-07-13 19:49:15,772 INFO L226 Difference]: Without dead ends: 28673 [2021-07-13 19:49:15,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:49:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28673 states. [2021-07-13 19:49:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28673 to 12481. [2021-07-13 19:49:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12481 states, 12480 states have (on average 4.493429487179487) internal successors, (56078), 12480 states have internal predecessors, (56078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12481 states to 12481 states and 56078 transitions. [2021-07-13 19:49:16,220 INFO L78 Accepts]: Start accepts. Automaton has 12481 states and 56078 transitions. Word has length 39 [2021-07-13 19:49:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:16,220 INFO L482 AbstractCegarLoop]: Abstraction has 12481 states and 56078 transitions. [2021-07-13 19:49:16,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 12481 states and 56078 transitions. [2021-07-13 19:49:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:49:16,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:16,400 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:16,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:49:16,601 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash -670711427, now seen corresponding path program 3 times [2021-07-13 19:49:16,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:16,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539482754] [2021-07-13 19:49:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:16,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539482754] [2021-07-13 19:49:16,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539482754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771441375] [2021-07-13 19:49:16,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:16,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:16,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:16,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:49:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:16,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:49:16,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:16,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:16,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:16,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 19:49:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:16,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771441375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:16,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:16,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 19:49:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756433979] [2021-07-13 19:49:16,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:49:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:49:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:49:16,825 INFO L87 Difference]: Start difference. First operand 12481 states and 56078 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:17,099 INFO L93 Difference]: Finished difference Result 28555 states and 129711 transitions. [2021-07-13 19:49:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:49:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:17,154 INFO L225 Difference]: With dead ends: 28555 [2021-07-13 19:49:17,154 INFO L226 Difference]: Without dead ends: 17145 [2021-07-13 19:49:17,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:49:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-07-13 19:49:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 11695. [2021-07-13 19:49:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11695 states, 11694 states have (on average 4.494783649734907) internal successors, (52562), 11694 states have internal predecessors, (52562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11695 states to 11695 states and 52562 transitions. [2021-07-13 19:49:17,586 INFO L78 Accepts]: Start accepts. Automaton has 11695 states and 52562 transitions. Word has length 39 [2021-07-13 19:49:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:17,587 INFO L482 AbstractCegarLoop]: Abstraction has 11695 states and 52562 transitions. [2021-07-13 19:49:17,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 11695 states and 52562 transitions. [2021-07-13 19:49:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:49:17,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:17,609 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:17,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:17,812 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1709582759, now seen corresponding path program 4 times [2021-07-13 19:49:17,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:17,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484530489] [2021-07-13 19:49:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:17,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:17,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484530489] [2021-07-13 19:49:17,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484530489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:17,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379577325] [2021-07-13 19:49:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:18,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:49:18,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:49:18,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:18,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:18,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:18,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 19:49:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:18,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379577325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:18,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:49:18,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400010494] [2021-07-13 19:49:18,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:49:18,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:49:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:49:18,127 INFO L87 Difference]: Start difference. First operand 11695 states and 52562 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:18,933 INFO L93 Difference]: Finished difference Result 41665 states and 191227 transitions. [2021-07-13 19:49:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:49:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:49:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:19,005 INFO L225 Difference]: With dead ends: 41665 [2021-07-13 19:49:19,005 INFO L226 Difference]: Without dead ends: 20790 [2021-07-13 19:49:19,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:49:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20790 states. [2021-07-13 19:49:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20790 to 11855. [2021-07-13 19:49:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11855 states, 11854 states have (on average 4.487599122659018) internal successors, (53196), 11854 states have internal predecessors, (53196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11855 states to 11855 states and 53196 transitions. [2021-07-13 19:49:19,511 INFO L78 Accepts]: Start accepts. Automaton has 11855 states and 53196 transitions. Word has length 39 [2021-07-13 19:49:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:19,511 INFO L482 AbstractCegarLoop]: Abstraction has 11855 states and 53196 transitions. [2021-07-13 19:49:19,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 11855 states and 53196 transitions. [2021-07-13 19:49:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:49:19,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:19,540 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:19,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:19,753 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1500175273, now seen corresponding path program 5 times [2021-07-13 19:49:19,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:19,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178986171] [2021-07-13 19:49:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:19,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:19,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178986171] [2021-07-13 19:49:19,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178986171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:19,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996715822] [2021-07-13 19:49:19,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:19,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:49:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:20,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 19:49:20,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:20,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-13 19:49:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-07-13 19:49:20,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:20,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-07-13 19:49:20,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:49:20,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:20,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:20,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 19:49:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:20,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996715822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:20,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:20,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:49:20,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811121553] [2021-07-13 19:49:20,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:20,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:20,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:20,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:20,153 INFO L87 Difference]: Start difference. First operand 11855 states and 53196 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:21,283 INFO L93 Difference]: Finished difference Result 31059 states and 140328 transitions. [2021-07-13 19:49:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:49:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:49:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:21,341 INFO L225 Difference]: With dead ends: 31059 [2021-07-13 19:49:21,341 INFO L226 Difference]: Without dead ends: 17895 [2021-07-13 19:49:21,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:49:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17895 states. [2021-07-13 19:49:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17895 to 12100. [2021-07-13 19:49:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12100 states, 12099 states have (on average 4.467311348045293) internal successors, (54050), 12099 states have internal predecessors, (54050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12100 states to 12100 states and 54050 transitions. [2021-07-13 19:49:21,773 INFO L78 Accepts]: Start accepts. Automaton has 12100 states and 54050 transitions. Word has length 39 [2021-07-13 19:49:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:21,776 INFO L482 AbstractCegarLoop]: Abstraction has 12100 states and 54050 transitions. [2021-07-13 19:49:21,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 12100 states and 54050 transitions. [2021-07-13 19:49:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:49:21,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:21,807 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:22,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:22,030 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:22,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1584459695, now seen corresponding path program 6 times [2021-07-13 19:49:22,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:22,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988822611] [2021-07-13 19:49:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:22,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:22,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988822611] [2021-07-13 19:49:22,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988822611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:22,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830651291] [2021-07-13 19:49:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:22,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:49:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:22,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 19:49:22,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:22,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:22,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:22,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-07-13 19:49:22,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:49:22,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:49:22,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:49:22,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:49:22,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-13 19:49:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:22,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830651291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:22,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:22,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:49:22,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108363564] [2021-07-13 19:49:22,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:49:22,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:49:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:49:22,369 INFO L87 Difference]: Start difference. First operand 12100 states and 54050 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:23,550 INFO L93 Difference]: Finished difference Result 38501 states and 174203 transitions. [2021-07-13 19:49:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:49:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:49:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:23,628 INFO L225 Difference]: With dead ends: 38501 [2021-07-13 19:49:23,628 INFO L226 Difference]: Without dead ends: 22306 [2021-07-13 19:49:23,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 707.8ms TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:49:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22306 states. [2021-07-13 19:49:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22306 to 12385. [2021-07-13 19:49:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12385 states, 12384 states have (on average 4.465923772609819) internal successors, (55306), 12384 states have internal predecessors, (55306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12385 states to 12385 states and 55306 transitions. [2021-07-13 19:49:24,158 INFO L78 Accepts]: Start accepts. Automaton has 12385 states and 55306 transitions. Word has length 39 [2021-07-13 19:49:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:24,158 INFO L482 AbstractCegarLoop]: Abstraction has 12385 states and 55306 transitions. [2021-07-13 19:49:24,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12385 states and 55306 transitions. [2021-07-13 19:49:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 19:49:24,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:24,184 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:24,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:24,385 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash -357357258, now seen corresponding path program 7 times [2021-07-13 19:49:24,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:24,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215400094] [2021-07-13 19:49:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:24,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215400094] [2021-07-13 19:49:24,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215400094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303941029] [2021-07-13 19:49:24,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:49:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:24,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303941029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:24,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:24,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:49:24,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985818390] [2021-07-13 19:49:24,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:49:24,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:49:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:49:24,523 INFO L87 Difference]: Start difference. First operand 12385 states and 55306 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:24,987 INFO L93 Difference]: Finished difference Result 27249 states and 122597 transitions. [2021-07-13 19:49:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:49:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 19:49:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:25,097 INFO L225 Difference]: With dead ends: 27249 [2021-07-13 19:49:25,097 INFO L226 Difference]: Without dead ends: 27113 [2021-07-13 19:49:25,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:49:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27113 states. [2021-07-13 19:49:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27113 to 19810. [2021-07-13 19:49:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19810 states, 19809 states have (on average 4.61017719218537) internal successors, (91323), 19809 states have internal predecessors, (91323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19810 states to 19810 states and 91323 transitions. [2021-07-13 19:49:25,759 INFO L78 Accepts]: Start accepts. Automaton has 19810 states and 91323 transitions. Word has length 42 [2021-07-13 19:49:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:25,759 INFO L482 AbstractCegarLoop]: Abstraction has 19810 states and 91323 transitions. [2021-07-13 19:49:25,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19810 states and 91323 transitions. [2021-07-13 19:49:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 19:49:25,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:25,798 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:25,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:49:25,999 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1048816836, now seen corresponding path program 8 times [2021-07-13 19:49:25,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:25,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008709564] [2021-07-13 19:49:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:26,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:26,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008709564] [2021-07-13 19:49:26,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008709564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:26,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698424861] [2021-07-13 19:49:26,043 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:26,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:26,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:49:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:49:26,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698424861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:26,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:26,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:49:26,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984752303] [2021-07-13 19:49:26,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:49:26,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:49:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:49:26,181 INFO L87 Difference]: Start difference. First operand 19810 states and 91323 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:27,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:27,836 INFO L93 Difference]: Finished difference Result 82676 states and 367107 transitions. [2021-07-13 19:49:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:49:27,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 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 42 [2021-07-13 19:49:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:28,480 INFO L225 Difference]: With dead ends: 82676 [2021-07-13 19:49:28,480 INFO L226 Difference]: Without dead ends: 82676 [2021-07-13 19:49:28,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:49:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82676 states. [2021-07-13 19:49:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82676 to 36990. [2021-07-13 19:49:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36990 states, 36989 states have (on average 4.724107166995593) internal successors, (174740), 36989 states have internal predecessors, (174740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36990 states to 36990 states and 174740 transitions. [2021-07-13 19:49:30,772 INFO L78 Accepts]: Start accepts. Automaton has 36990 states and 174740 transitions. Word has length 42 [2021-07-13 19:49:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:30,773 INFO L482 AbstractCegarLoop]: Abstraction has 36990 states and 174740 transitions. [2021-07-13 19:49:30,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 36990 states and 174740 transitions. [2021-07-13 19:49:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 19:49:30,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:30,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:31,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:49:31,073 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1124781682, now seen corresponding path program 9 times [2021-07-13 19:49:31,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:31,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613344862] [2021-07-13 19:49:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:31,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613344862] [2021-07-13 19:49:31,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613344862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879267895] [2021-07-13 19:49:31,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:31,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:31,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:49:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:49:31,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879267895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:31,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:31,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:49:31,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791392951] [2021-07-13 19:49:31,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:49:31,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:31,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:49:31,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:49:31,253 INFO L87 Difference]: Start difference. First operand 36990 states and 174740 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:33,231 INFO L93 Difference]: Finished difference Result 113737 states and 542628 transitions. [2021-07-13 19:49:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:49:33,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 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 42 [2021-07-13 19:49:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:34,211 INFO L225 Difference]: With dead ends: 113737 [2021-07-13 19:49:34,212 INFO L226 Difference]: Without dead ends: 113627 [2021-07-13 19:49:34,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:49:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113627 states. [2021-07-13 19:49:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113627 to 77752. [2021-07-13 19:49:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77752 states, 77751 states have (on average 4.973543748633458) internal successors, (386698), 77751 states have internal predecessors, (386698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77752 states to 77752 states and 386698 transitions. [2021-07-13 19:49:37,826 INFO L78 Accepts]: Start accepts. Automaton has 77752 states and 386698 transitions. Word has length 42 [2021-07-13 19:49:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:37,826 INFO L482 AbstractCegarLoop]: Abstraction has 77752 states and 386698 transitions. [2021-07-13 19:49:37,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 77752 states and 386698 transitions. [2021-07-13 19:49:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 19:49:38,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:38,487 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:38,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:49:38,687 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash -484411891, now seen corresponding path program 10 times [2021-07-13 19:49:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105957523] [2021-07-13 19:49:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:49:38,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:38,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105957523] [2021-07-13 19:49:38,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105957523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:38,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134328466] [2021-07-13 19:49:38,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:38,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:38,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:38,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:49:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:49:38,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134328466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:38,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:38,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-07-13 19:49:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923962239] [2021-07-13 19:49:38,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:49:38,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:38,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:49:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:49:38,839 INFO L87 Difference]: Start difference. First operand 77752 states and 386698 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:41,832 INFO L93 Difference]: Finished difference Result 180946 states and 909108 transitions. [2021-07-13 19:49:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 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 42 [2021-07-13 19:49:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:43,548 INFO L225 Difference]: With dead ends: 180946 [2021-07-13 19:49:43,549 INFO L226 Difference]: Without dead ends: 175421 [2021-07-13 19:49:43,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175421 states. [2021-07-13 19:49:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175421 to 146812. [2021-07-13 19:49:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146812 states, 146811 states have (on average 5.126325684042749) internal successors, (752601), 146811 states have internal predecessors, (752601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146812 states to 146812 states and 752601 transitions. [2021-07-13 19:49:51,094 INFO L78 Accepts]: Start accepts. Automaton has 146812 states and 752601 transitions. Word has length 42 [2021-07-13 19:49:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:51,095 INFO L482 AbstractCegarLoop]: Abstraction has 146812 states and 752601 transitions. [2021-07-13 19:49:51,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 146812 states and 752601 transitions. [2021-07-13 19:49:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 19:49:52,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:52,031 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:52,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,254 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:49:52,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:52,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1118881297, now seen corresponding path program 11 times [2021-07-13 19:49:52,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:52,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046196706] [2021-07-13 19:49:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:49:52,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:52,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046196706] [2021-07-13 19:49:52,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046196706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506012095] [2021-07-13 19:49:52,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:52,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:52,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:49:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:49:52,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506012095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:52,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:49:52,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457083648] [2021-07-13 19:49:52,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:49:52,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:49:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:49:52,426 INFO L87 Difference]: Start difference. First operand 146812 states and 752601 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:58,570 INFO L93 Difference]: Finished difference Result 370786 states and 1885721 transitions. [2021-07-13 19:49:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:49:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 19:49:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:03,095 INFO L225 Difference]: With dead ends: 370786 [2021-07-13 19:50:03,096 INFO L226 Difference]: Without dead ends: 363752 [2021-07-13 19:50:03,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:50:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363752 states. [2021-07-13 19:50:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363752 to 272461. [2021-07-13 19:50:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272461 states, 272460 states have (on average 5.233524187036629) internal successors, (1425926), 272460 states have internal predecessors, (1425926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272461 states to 272461 states and 1425926 transitions. [2021-07-13 19:50:23,750 INFO L78 Accepts]: Start accepts. Automaton has 272461 states and 1425926 transitions. Word has length 42 [2021-07-13 19:50:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:23,751 INFO L482 AbstractCegarLoop]: Abstraction has 272461 states and 1425926 transitions. [2021-07-13 19:50:23,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 272461 states and 1425926 transitions. [2021-07-13 19:50:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 19:50:26,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:26,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:26,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:50:26,673 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 19:50:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -185659631, now seen corresponding path program 12 times [2021-07-13 19:50:26,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:26,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444850788] [2021-07-13 19:50:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:50:26,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:26,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444850788] [2021-07-13 19:50:26,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444850788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:26,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868288404] [2021-07-13 19:50:26,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:26,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:50:26,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:50:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:50:26,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868288404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:26,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:26,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:50:26,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834719086] [2021-07-13 19:50:26,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:50:26,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:50:26,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:50:26,946 INFO L87 Difference]: Start difference. First operand 272461 states and 1425926 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)